Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff84c81d69feac2…

MALICIOUS

PDF

82.9 KB Created: 2021-03-29 06:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bc5ff9da8b1f1010705a849b5687480c SHA-1: 091c7c4e6a729c13938aec269fc10742f1f9ae2f SHA-256: 6ff84c81d69feac2b2915ad59f27364d8ae899b32546e6166dc3f8686bda278e
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits multiple critical heuristic firings, including brand impersonation for credential phishing (Facebook) and detection as a malicious PDF by ML classifiers and ClamAV. It contains a mass external link farm hosted on disposable domains, suggesting a phishing or spamming operation. The embedded URLs and link farm indicate an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/pojagosusotaja-desumuwasuf-kibitiwisewo-xiwekeguj.pdf.
  • 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://kuzutuzo.ru/wix?keyword=indian+iptv+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372740/normal_603127449a264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fec672dd64be.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/pojagosusotaja-desumuwasuf-kibitiwisewo-xiwekeguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_602eec8b4c326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_602f6f4ca4ebd.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/guwani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6027da8ca6b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_600e389d0f74d.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/hdij4ha/lamoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5fe16edf6f041.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/6933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_6035575306f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_604da8681c684.pdfIn PDF document text
    • https://nawiveburejofi.weebly.com/uploads/1/3/1/3/131381882/retuv-mozijom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_605d69f3522f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_60610e17adf78.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/jjalVgi/queso_fundido_in_english_word.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/KON6pid/lizokogusogukoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6041a07b2f93c.pdfIn PDF document text
    • https://dilaxizinis.weebly.com/uploads/1/3/5/9/135973905/zafizumuvelob.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://wevosowenafa.epizy.com/ignou_ma_sociology_syllabus_2020.pdfIn PDF document text
    • http://fozilixugijuva.epizy.com/glorantha_bestiary.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/bakojaw.pdfIn PDF document text
    • http://kajuwipaf.epizy.com/wemowepetefibaxifuto.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 4528 bytes
SHA-256: e80da8f9f23000e797ddca8bafea096bbd4c6cfc0c0ec854b232e036c53caba1
font_01_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 11480 bytes
SHA-256: e39230befd4d5b8aa6161a33f6255c154866eb03f9b7afc6305b1a3362186741
font_02_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 16072 bytes
SHA-256: 4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd
font_03_sfnt_off00012f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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