Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea125a438b99da79…

MALICIOUS

PDF

84.6 KB Created: 2021-04-04 22:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dd58751f7e477348686d2def1a416904 SHA-1: b12ba8255bd1835090c8be326e7fece6b7c5d33c SHA-256: ea125a438b99da791d8bdfbfc50ecfc5d91d626f4c9978f1c65c68531db881fd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=jedi+sentinel+combat+build+6.0 PDF link annotation
    • https://perasukene.weebly.com/uploads/1/3/4/6/134644841/20a4a8b6e6ebc75.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/7d228865da22.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/buzutexen-potepu.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/can_you_calibrate_an_infrared_thermometer.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/piginezorawunodut.pdfIn PDF document text
    • https://tiwuvaxitunux.weebly.com/uploads/1/3/0/8/130874175/1934969.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/wuremuxosuwenafe.pdfIn PDF document text
    • https://baneboveboxov.weebly.com/uploads/1/3/0/7/130775782/bijijusebezim.pdfIn PDF document text
    • http://nezatarofarix.getenjoyment.net/xipimuzopesumafatejudop.pdfIn PDF document text
    • http://disozire.mygamesonline.org/4_pics_one_word_level_215_answer.pdfIn PDF document text
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/507bbfb5c6ba7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/37241117225.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/hallelujah_praise_ye_the_lord_sheet_music.pdfIn PDF document text
    • http://bokepomi.onlinewebshop.net/bengali_story_book_download_free.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/95071542073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc51483-e722-4e1f-8a3b-2d3bf6d976d9/how_to_connect_panasonic_cordless_phone_to_cell_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a56b2a7-08b0-44e2-87c5-5ca132775ac8/92430943948.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/tabela_de_preos_de_carros_novos_suv.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/employment_news_paper_tamil_this_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49861101-62fc-4cd0-993e-1301954cfb52/best_mythology_fiction_books_of_all_time.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/55534095567.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 5448 bytes
SHA-256: f26a093b1b03575f800f9e54f6cb73305d997d5b47c5d2cf1cea4629ec5f3788
font_01_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 11192 bytes
SHA-256: 8022e2206290bb789399cbd552991e582558f0ad08a1f8f1ca21d7afd54a3f9c

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