Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4192097eea23ae7…

MALICIOUS

PDF

78.7 KB Created: 2021-04-23 17:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab42a81e873f549b8bc4f00928406ba9 SHA-1: e14149d3c6fe767b7a8ed6dc124afacc4f47608e SHA-256: d4192097eea23ae758858c9c81412be95e62a3d73a33c5969dca79e2a88583f6
186 Risk Score

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 0.9997

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://jottigo.ru/strik?utm_term=what+is+the+best+definition+of+research+brainly PDF link annotation
    • https://todatukutazatu.weebly.com/uploads/1/3/5/3/135309816/xexapabisujijaj-bukakogubenosib-xezuvinetiboxaw-doxegemipofa.pdfIn PDF document text
    • https://dutegonuguval.weebly.com/uploads/1/3/4/3/134310875/fumuwokikizebugexuno.pdfIn PDF document text
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/3209705.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/81644877829.pdfIn PDF document text
    • https://cdn.sqhk.co/zudatona/8LLzGLY/22312941183.pdfIn PDF document text
    • http://lp-consalt.ru/the_mortal_instruments_city_of_bones_chapter_1_summaryyy8iw.pdfIn PDF document text
    • http://tokio-2020.fun/tavomiregivofinotzqdn1.pdfIn PDF document text
    • https://semanipiji.weebly.com/uploads/1/3/5/3/135312460/432faec7f95fc4.pdfIn PDF document text
    • http://letgtma.bid/53315132106auvit.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/fsschf1/blundstone_boots_men.pdfIn PDF document text
    • http://2020coupons.info/belly_fat_exercise_plantf7c9.pdfIn PDF document text
    • http://fbcopyright-center.com/gisiwargefm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_c2adc855da134a8d986bd9021ec5b38e.pdf?index=trueIn PDF document text
    • http://zodiripek.myartsonline.com/laszlo_bock_work_rules_download.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_a61b9c810bfb4411a7ef67f32a5ed2f6.pdf?index=trueIn PDF document text
    • http://jefiferinazubim.atwebpages.com/86106556250.pdfIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_a0b099dc00a843d6af2de3d91f653cc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kabisebax/sp_303_vinyl_sim.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/number_333_meaning_in_love.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_6fbfa99322da47b2a6d3dce22386e6db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/joradakamenedutipixonobo.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_777b44dcf89c49319bb5be39bc7a9009.pdf?index=trueIn 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_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 5364 bytes
SHA-256: 9d49a65fe8710682a0697132635488511731b7f1c8dc3fd82ad1bd42321d0431
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 10812 bytes
SHA-256: 620d3cd47c2af6021a72a42e9e340f3c1363e99f2fd7ec46819f812a827e5b43

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