Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb7071194fddafc…

MALICIOUS

PDF

78.0 KB Created: 2021-04-21 15:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6f87593c7c81a334f317cf7d90b2544d SHA-1: 1237339faa37f12227df0230d48b37a95b67c3a4 SHA-256: 9eb7071194fddafcf1baa0d3b206180ed9a457dc4b5109ed7d51a92efa6b511e
286 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials T1059.007 JavaScript

The PDF document exhibits multiple critical heuristic firings indicating a credential phishing lure, specifically impersonating Coinbase. It requests sensitive information such as recovery secrets or MFA confirmation, aligning with credential harvesting tactics. The presence of embedded URLs pointing to suspicious domains further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rotasemenedifo.weebly.com/uploads/1/3/5/9/135985080/da3b2.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://kuzutuzo.ru/strik?utm_term=how+do+you+trade+bitcoins+step+by+step PDF link annotation
    • http://kvyovk.xyz/cunto_cuesta_un_juicio_sucesorio_testamentario_en_mxicolcgq5.pdfIn PDF document text
    • http://hellesypakk.online/rafiduledumhmlm.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/chbunkW/selaratusijade.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/odii3ge/zasarazoke.pdfIn PDF document text
    • https://rotasemenedifo.weebly.com/uploads/1/3/5/9/135985080/da3b2.pdfIn PDF document text
    • http://saburogamo.iblogger.org/dusakalavixif.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/Qaighiw/translate_to_spanish_do_you_speak_chinese.pdfIn PDF document text
    • https://radewisuvux.weebly.com/uploads/1/3/4/6/134689192/8939443.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/3358784.pdfIn PDF document text
    • https://cdn.sqhk.co/jegivoziba/n0zDaHp/libadenetalogudel.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/SPjhjgY/gameboy_color_link_port.pdfIn PDF document text
    • http://buylettersonline.com/photive_bth3_philippines81mkz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a3e203-fcad-439b-8737-63f97c8e699f/brainpop_microscope_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cd6b16-bbd3-4ec8-9874-daf69db0561e/syma_x5c_battery_2000mah.pdfIn PDF document text
    • http://damufib.epizy.com/talosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2438335b-b4b6-4365-a591-bf2e768747c3/the_chemistry_of_life_chapter_2_worksheet_answers.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/eschooltoday._com_natural_resources_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f787cb86-f193-462b-9008-8b5ca44bd3c0/vademerotalovaladasorul.pdfIn PDF document text
    • http://ridinodasifaji.rf.gd/top_500_songs_of_all_time.pdfIn PDF document text
    • http://lidiwerefibe.rf.gd/29658980362.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_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 5328 bytes
SHA-256: 4f5625e1468df7ea17fc7d8f6023ddb2d6cc3cc745e730331619d95dcb130872
font_01_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 10840 bytes
SHA-256: 88f5595d3ab4d13b327d88c2245f2618f62becbc02386dbf88418a41a1f373f4

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