Malicious PDF — malware analysis report

Static analysis result for SHA-256 3949a8caf939bc94…

MALICIOUS

PDF

78.9 KB Created: 2021-03-28 08:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e126f83ab37c26845551a30d94482841 SHA-1: ccba970e77b4e12aa01f7fa5a8c92d7401bd5341 SHA-256: 3949a8caf939bc94d797b7fbb54b81d31e1df88aa509fccf4da420e10e1b1939
156 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=vizio+32+inch+tv+mounting+screws PDF link annotation
    • http://finuxezanasa.mygamesonline.org/honda_eu6500is_manual.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/tewagezegiva.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/free_printable_venn_diagram_template_with_lines.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/nofadoletex-welazakipa-pusizibiwoxavu.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/nilobotomosunemif.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/kupun.pdfIn PDF document text
    • https://bevoparekev.weebly.com/uploads/1/3/4/0/134018333/d78afc67.pdfIn PDF document text
    • https://refaxoke.weebly.com/uploads/1/3/4/6/134602084/rixesurefolenibedil.pdfIn PDF document text
    • https://negogesi.weebly.com/uploads/1/3/0/7/130739616/kagugabenoriparovemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowoniwetob.atwebpages.com/common_interview_questions_for_teachers_and_how_to_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/nasuvopuretiziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffd01f5-cd4c-471f-8edf-12d898062e3f/96474600198.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/jisamerejixore.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/lexomuner.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/is_dds_discount_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec849645-e5de-4806-abf8-3ecabef4920e/69989713339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3a607e-6b86-47f1-99b0-a4222f6e4775/90890758854.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/wokapoxavesa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/what_is_the_quran_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56450160-4c05-4fa7-ac0a-6f28ab3052ea/fios_router_g3100_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/working_at_mcdonalds_situational_judgement_test_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_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 5432 bytes
SHA-256: 4f975cf3ea94509db39a7a136fa827fe5c236f328b8c0b4051ab128525dad0dd
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 11192 bytes
SHA-256: 59daf529d35dfc5066d73c3040810ecf468ec7339ed9a723de51364896192355

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