Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c614a6932d63057…

MALICIOUS

PDF

70.7 KB Created: 2021-03-06 04:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0feb48c61dd492a0b7c6431b7c9f23ad SHA-1: 464430cc94d7d4cb53b37244008ae84bc570a1a6 SHA-256: 4c614a6932d6305748ce7a2570173746ed2b0d475aed46e48cbcc5119281803b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://druttle.ru/award?keyword=best+targets+for+200+yards PDF link annotation
    • http://kazedoruredupe.22web.org/georges_marvellous_medicine_grandma_character_description.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/is_50_shades_darker_on_netflix.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/breckwell_pellet_stove_diagnostic_code_2.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/scag_turf_tiger_2_price.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/installing_and_configuring_windows_10_exam_70-698.pdfIn PDF document text
    • http://xixosifa.22web.org/jesexasufupaseni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wujawejibizub.epizy.com/folonupipepogusixepovupa.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/goxupazekoroxidele.pdfIn PDF document text
    • http://xegutosedon.rf.gd/37873804736.pdfIn PDF document text
    • http://tagutibebik.rf.gd/aashiq_banaya_aapne_video_song_likewap.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/99213390390.pdfIn PDF document text
    • http://kutepiguzusudax.epizy.com/7267535656.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_ece417bc19f148ab9907c97ad1232e48.pdf?index=trueIn PDF document text
    • http://teruwizirazi.rf.gd/38452141291.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/40413815743.pdfIn PDF document text
    • http://zawopomosegasax.rf.gd/43917568205.pdfIn PDF document text
    • http://sikekuji.epizy.com/corporate_identity_package_price_south_africa.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_9263b3b0bdd543e59acfa742c5de0355.pdf?index=trueIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_7b04661dc840429db530803753699c0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/rosagilogijafew.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/pipukumiparud.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/formato_cedula_venezolana_editable.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_5f4c6fd52c954504977ef70ba578b6b6.pdf?index=trueIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_604b2eb1cc5f4c189e3f7a1a2b99b128.pdf?index=trueIn PDF document text
    • http://lafeseg.rf.gd/chicago_sun_times_crossword_answers.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_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5468 bytes
SHA-256: 7b9a3f155957d050c9fe7ab715619849d3699bd4da870a83e43cb3eced6a25fb
font_01_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 11092 bytes
SHA-256: 68fcf97c686c1b5cda5a68344ec3086352c70e47cf8986594851022957cfea79

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