Malicious PDF — malware analysis report

Static analysis result for SHA-256 f869818d71cc6bcf…

MALICIOUS

PDF

68.3 KB Created: 2020-12-28 09:23:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 50ea1ef114012894928fb6a5ef30baf9 SHA-1: 57e870f9eadeb9f3c79ba795734c7846445c1118 SHA-256: f869818d71cc6bcfba19c41f810e7bbb4d7ba58b34e4cee71b5e0e492688fe8f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs, such as 'https://traffset.ru/aws?utm_term=hand+of+fate+2+ps4+trophy+guide', are part of this network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/aws?utm_term=hand+of+fate+2+ps4+trophy+guide PDF link annotation
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/sebupisum.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/3231336.pdfIn PDF document text
    • https://fesitafixob.weebly.com/uploads/1/3/4/6/134653549/repixor-nutokugen.pdfIn PDF document text
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/1f60d488701d.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/vipewapapoma.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8be2593e20f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f8de24226905.pdfIn PDF document text
    • https://memudodonimik.weebly.com/uploads/1/3/1/4/131406547/wimekuzubigowa.pdfIn PDF document text
    • https://buroxaserojer.weebly.com/uploads/1/3/1/0/131070485/6943465.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/5e84057e.pdfIn PDF document text
    • https://cdn.sqhk.co/gisopagipize/jhjj9ic/7913142006.pdfIn PDF document text
    • https://puvukiroleta.weebly.com/uploads/1/3/1/4/131455247/pofimositopi.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/VxCCsqQ/xajusupununiliwa.pdfIn PDF document text
    • https://butiziro.weebly.com/uploads/1/3/4/3/134308177/sodem-dizitabiw-sibavuworaw-fogad.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/4f6e0ae4-b892-45ca-aeb0-65d50883724e/sutobolafoxonaxosirusirig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c75a2b-1143-4fae-a69b-b147899298fd/royal_defense_king_mod_apk_home.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_off0000ced8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED8 5552 bytes
SHA-256: e6ef30b557b0f626ddc6d95b8f5c869956cdd429d278eb786e071d420934c2f7
font_01_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 10164 bytes
SHA-256: c950db801f2437f9437c60c47afd89ac863ae2c33d03625c5d035cb0af166d66

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