Malicious PDF — malware analysis report

Static analysis result for SHA-256 74af342188e4a2bd…

MALICIOUS

PDF

77.1 KB Created: 2021-06-07 01:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4e457161a8294317f7373126fc9866f SHA-1: ddda40dddaa5ca8830a46bd6cd9dbeeab830c6ee SHA-256: 74af342188e4a2bd75654212b339d7e18ae26929a7a19c80348015f5107baea8
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://fokemale.ru/123?utm_term=critical+ops+mod+apk+unlimited+money PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427313/normal_5fcb768dee0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6051f1252e26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600be38775015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_604f684fbeebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd1f1a79d1ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_603df1d33cdfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_601b7f5a6534d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fe694da6671d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_604d172ce7126.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_5ff23b1126b42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_5ffa71364297b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_6046d860b2b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_600ecec455402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489257/normal_5ff57acbd57bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_606467a181f53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewiwebula.pbworks.com/f/video_chat_apps.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144578961/how_to_drain_fisher_and_paykel_dishdrawer.pdfIn PDF document text
    • http://nugurafuge.pbworks.com/f/99280371370.pdfIn PDF document text
    • http://sapagujedok.pbworks.com/w/file/fetch/144719373/bifevigogos.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144480492/how_to_get_pbe_account_league.pdfIn PDF document text
    • http://labidan.pbworks.com/f/77044095143.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144419112/rilaz.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144679419/why_is_my_freezer_flashing_red.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144424467/crucible_act_1_notes.pdfIn PDF document text
    • http://fuvotobike.pbworks.com/f/sigujamigum.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_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 5288 bytes
SHA-256: 35a360dc218384316b76252768edba7bce5c35b95f927119c871c37e3fe40017
font_01_sfnt_off0000fe9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 12464 bytes
SHA-256: 41318ebca3b43623f56527ff6d8aeab2730206064f1f3c6a9168375f77b6dcc9