Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0fc0823bc5a6f3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-17 23:30:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d173da0247f1c9106579a18096b4c017 SHA-1: ec91080d1f29eea08fa0ad5910f65d32fb21c415 SHA-256: 0c0fc0823bc5a6f3a199848cecc8bc3af17d492f24ce4103bc922a8cf337ff30
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded content, though heavily obfuscated, indicates an attempt to redirect users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://vilenefex.ru/123?utm_term=3d+model+objects PDF link annotation
    • https://juvumumirogo.weebly.com/uploads/1/3/5/3/135313675/606913.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/62930331067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fc9ae80e2ebb.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/abbot_s_leigh.pdfIn PDF document text
    • http://1gusevshop.space/783045116421uz3i.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/play_tamil_hd_movie_freeyvsmu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_604204df48ae5.pdfIn PDF document text
    • https://larikizog.weebly.com/uploads/1/3/1/0/131071312/keruzur-pemep-mativexonego.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/dowry_prohibition_act_1961_in_telugu.pdfIn PDF document text
    • http://bidusifekinu.66ghz.com/segment_addition_postulate_activity.pdfIn PDF document text
    • https://mapatujil.weebly.com/uploads/1/3/1/4/131454051/memoxuwute.pdfIn PDF document text
    • http://itdomen.fun/data_analysis_tools_in_excel0elkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_604a19f74201d.pdfIn PDF document text
    • http://disconto50.info/what_does_a_speakeasy_bar_meanx15f5.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/vezozagezalevomutupevi.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
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_fc0ad08f8e6a497b85a73fb90d16457b.pdf?index=trueIn PDF document text
    • http://kagiwabiluwotel.epizy.com/bobafide.pdfIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_b287ee087ea34c4287c66aa1507f2b44.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_c204cb6448e74b6ab00704d5cf955bfe.pdf?index=trueIn PDF document text
    • http://rogofideb.onlinewebshop.net/javosamefeso.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_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 4696 bytes
SHA-256: 4ecdc71ae0e3c1001c159f3db2c42926a06fa8e3ce4e514cd6898bcf089434db
font_01_sfnt_off00010811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10811 10776 bytes
SHA-256: 4a3fd9cdbbc39556e00c9336ff8fca0a563bee9ce8ce537cf3de53c871de2814
font_02_sfnt_off00012cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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