Malicious PDF — malware analysis report

Static analysis result for SHA-256 910d58fd23e55fa6…

MALICIOUS

PDF

76.0 KB Created: 2021-02-24 17:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e356041786357fe85fc328cbea828244 SHA-1: b06a5d7cde2df2753b66c9fb0fbb5e41bc4a6a34 SHA-256: 910d58fd23e55fa625f59422a8e8bb573fb55278b42af5af6b0bd8d530d1c9d9
286 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, specifically flagged as a credential phishing lure impersonating Gmail. It contains multiple links to external domains and redirectors, including one that appears to be part of a link farm. The document's purpose is to trick users into providing their Google account recovery secrets or MFA codes, likely to gain unauthorized access to their accounts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/gedibatinamuti.pdf.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://bologen.ru/strik?utm_term=find+my+google+account+recovery PDF link annotation
    • https://cdn.sqhk.co/zovifesojeme/hbOJDid/36329179818.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/gedibatinamuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_601a13c040dd5.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/wumusazatinubovawiteh6cmk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5fd6df76e4a77.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/imperial_leather_mcclintock_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_5fefc2d014787.pdfIn PDF document text
    • http://azorocheat5.xyz/11635803172yx4im.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_602b9e5ded369.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/olivetti_lettera_32_manuale_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/gccAjhG/52051397378.pdfIn PDF document text
    • https://poxosuliw.weebly.com/uploads/1/3/1/3/131383655/44c85351.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/ggjiLjg/english_speaking_practice_course_online_free.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/gasalujaturuba-xagitifodose-favoxupix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc80a717f27d.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/8ece613325.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://widifusi.myartsonline.com/xaviera_hollander_libros_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 5080 bytes
SHA-256: 4199e960bb7ef716ae98cbb81e7948f1d88af1b86c4e74182ac5341a20ba76d4
font_01_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 11048 bytes
SHA-256: ebbd2e95a19f4cf06a3be9282c18c110b1eaadcd9e471b6ae8d8943552ee2019
font_02_sfnt_off0001134d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378