Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e980de2bce61c68…

MALICIOUS

PDF

78.3 KB Created: 2021-02-21 14:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 362f76f09b3f400a14d79cee8ac741b3 SHA-1: 58f23ad6b6bc9bfd933493418bdea642180c2d82 SHA-256: 5e980de2bce61c686ff000f6dc23f1249ae0feff1ba128a6d6bcd5e77c8573bb
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous URLs pointing to disposable domains and Weebly subdomains, many of which are associated with link farms and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic for a 'download button' lure suggest the document is designed to trick users into downloading a payload, possibly an APK related to social media followers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=instagram+free+followers+apk+for+pc PDF link annotation
    • http://momentikshop.space/33351433842jeo57.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/ghierii/13390256624.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/ibiipap/lme_copper_price_january_2020.pdfIn PDF document text
    • https://redobalopubijav.weebly.com/uploads/1/3/1/3/131380120/tipejuzaz_bapetebazite.pdfIn PDF document text
    • http://ecoterritory.store/follow_me_david_platt_videox9yaf.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/tevez.pdfIn PDF document text
    • http://swast-group.website/sozevatufizamkkf1.pdfIn PDF document text
    • http://afracheat2.xyz/microsoft_outlook_for_mac_free_2016satsc.pdfIn PDF document text
    • https://cdn.sqhk.co/sejaganetaxa/fnOjfhh/70123340784.pdfIn PDF document text
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/pamekitoju-mukurisasas-kafipu-roxumazepiji.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/6bce03.pdfIn PDF document text
    • http://auto-fishing-rods1.club/sathuranga_vettai_2_tamil_movie_tamilrockers5ntx9.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ejgHhVz/zoxuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_6011bea121beb.pdfIn PDF document text
    • http://reduslim-ufficiale.website/bojofefiwakkdza.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/bibefexapaxuxevd0qd6.pdfIn PDF document text
    • http://micrometer25bill.site/regina_olson_hughes_known_for25x7i.pdfIn PDF document text
    • http://table-wait.com/someone_like_you_piano_sheet_music_easydljkh.pdfIn PDF document text
    • http://begemot.space/the_lord_of_the_rings_the_fellowship_of_the_ring_full_movieph05m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 5168 bytes
SHA-256: 8c6b39b5b42468b89c3976987cb2a58931960129577f951201963f61b7930d49
font_01_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 10408 bytes
SHA-256: ce2c6fec6c43cf6f3ea6f1f583b69fa1ead4fd79a5a42744d1d598216f2919a1
font_02_sfnt_off00011d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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