Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebe4d5a363c285c…

MALICIOUS

PDF

91.6 KB Created: 2021-03-06 05:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0e52a25f91fd217f0479252ae3c7aa9c SHA-1: 7f2f8d843a9ef2df6f175bd8bcdb1011ecf51a38 SHA-256: 7ebe4d5a363c285cd5831f285851f760e1303ff6360d27bd1df80526f891c975
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, many of which point to link farms and redirectors, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=aloha+breeze+tower+fan+with+remote In PDF document text
    • http://sdfsdfsdf.shaketorch.com/49980938909.pdfIn PDF document text
    • http://pivowave.iblogger.org/boy_scout_store_massapequa_ny.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/benuruxel-sakowokupefa.pdfIn PDF document text
    • http://dipurenirexo.22web.org/questions_and_answers_for_possessive_pronouns.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/ejemplos_de_como_hacer_una_minuta_de_trabajo.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/1463106.pdfIn PDF document text
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/1953571.pdfIn PDF document text
    • https://patoduwewoz.weebly.com/uploads/1/3/1/4/131483118/pareribupolaxun_biduzivamibul.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/1698301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_a16d537e8e3c4e418ebd39c73b37c059.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_d83cc0210b1341dda03c52f7c12d2285.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/072118c7-16f3-416d-a86d-85aeba7dbfba/shrek_childrens_book.pdfIn PDF document text
    • http://tidegofavinugaw.epizy.com/41822729221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5e9c42-27a4-42c7-aa64-6ed361dfcb63/24555652823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2d92dd-4cee-4f81-9bf6-4ee9cff4e7f2/75161191471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f915d-d681-421b-9801-b540f30e3224/sonic_large_tater_tots_with_cheese_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4e43b8-84bb-48b3-86e7-9c88ff2c596d/50724734410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f7bfa6-def7-492b-90ae-b4146c77831b/monsterology_the_complete_book_of_monstrous_beasts.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_2f408c67d618439eb36f5234e5dd65b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0474a4fa-1625-40f8-bb35-03a68f3e43c1/95875794218.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_5a120c8076354db7aab595d6228306cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33538796-a020-4094-b14c-51004d4016ab/most_common_cause_of_death_in_burn_is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37760edb-b610-4962-8d81-05bd52668b33/eureka_easy_clean_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e8a7bf-bc59-4b26-b8be-c6ce001ac37e/cricut_crv001_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89408293-a0f6-49a4-9d43-155ae7b27da2/fobokuvave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457faee4-6dfe-4e83-81a5-614703fb70da/timex_ironman_watch_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ff9354-8e98-4007-b1ae-b982045b4b00/cyberpunk_red_miniatures_review.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off000113ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 5100 bytes
SHA-256: b0aa5a2d0748b7bd56d5b3b4991a933ac0dd58b135d15c5fd98b308c3310bc21
font_02_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 11052 bytes
SHA-256: 9ea1fd2ecc9b0e3ef859fa491aa3642b5e898f5d48488cf8bde6a7d8c7f5d75a
font_03_sfnt_off00014ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD6 16232 bytes
SHA-256: aa80f4aa60c1702d470611faf1dd1cb097060b3ca15091ea91ec367cc5cbd9c4

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