Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d3b664cd3b567e…

MALICIOUS

PDF

79.6 KB Created: 2021-02-28 19:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2c3860219d9da6fb32dc11aca75a3a2e SHA-1: 554f22f8d238e124aedcf711bc076dfe11d65dfd SHA-256: 60d3b664cd3b567e7cc45a877c7b929d671c3320f7bc992e02c9cfe2a1c39341
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these linked sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://gimoguvi.ru/wix?keyword=enhanced+economy+oblivion PDF link annotation
    • http://creditscorehelp.info/philips_norelco_hair_clipper_series_5000_reviewvvp8a.pdfIn PDF document text
    • http://soul-felt.com/where_can_i_get_a_customs_declaration_formv57wm.pdfIn PDF document text
    • https://cdn.sqhk.co/domuduxuro/dhhifij/10050880023.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/ggllp8E/mi_quiz_time.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/bxjeGhe/71591814055.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/jeujg8e/14095857882.pdfIn PDF document text
    • https://dupopawo.weebly.com/uploads/1/3/4/6/134652833/ragolibusogijik.pdfIn PDF document text
    • https://cdn.sqhk.co/manewujunug/jjijjjb/lock_screen_wallpapers_iphone_8.pdfIn PDF document text
    • http://requiremcgood.com/mudorudery77.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/fixidebavodoge_lorazezajokem.pdfIn PDF document text
    • http://jopkapopka.online/five_nights_at_freddys_4_apk_full_version_free_downloadmip4y.pdfIn PDF document text
    • http://return-0.com/super_mario_bros_3_emulatorl5c0e.pdfIn PDF document text
    • http://haifaiv.ru/93563581674btyj0.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/WhagdeK/67669664237.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/hwgcjb5/tetris_99_online_multiplayer.pdfIn PDF document text
    • http://gordei2d.com/18862560392vpc87.pdfIn PDF document text
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/bererikuna.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/pjfjfgg/wechat_app_for_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/6giu1je/fubirewob.pdfIn PDF document text
    • https://bivawufixusu.weebly.com/uploads/1/3/1/4/131453301/meximabotu-mikaw-nazuluwe-gewenogir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojixefem.epizy.com/vudujalitokumipukisuj.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/1551494320.pdfIn PDF document text
    • http://tanijug.rf.gd/bijav.pdfIn PDF document text
    • http://xitiwefebulu.rf.gd/canvas_business_model_prezi_template.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_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 5164 bytes
SHA-256: bafa0b8322336e17bdfc45a4c586f9dc262c4779964a318b0a49fe40cbae9a63
font_01_sfnt_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 9968 bytes
SHA-256: c4c79ae1cd315c9bf76adce464f219856a1a1a75ba6baceeb6f61c0ddf4deec2

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