Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d4ae2ce40f6672…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 05:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f0c220b3015b94195990207116a271 SHA-1: 90d2d873c80cfb129842d67d5ac4401b032924b6 SHA-256: 89d4ae2ce40f667242c73c5a9989c6a1472e493b299cf161f6dcb7916250c42f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a search query, suggesting a tactic to manipulate search engine results or direct users to a collection of potentially malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=on+guard+william+lane+craig+pdf
    • https://cdn-cms.f-static.net/uploads/4370764/normal_601e1c2556f43.pdf
    • https://static.s123-cdn-static.com/uploads/4372104/normal_60017ddb5ec4d.pdf
    • https://cdn-cms.f-static.net/uploads/4447434/normal_60217e6749640.pdf
    • https://waretopaze.weebly.com/uploads/1/3/4/5/134529701/e50b534fb38e3.pdf
    • https://cdn.sqhk.co/paxajirawegu/cAienja/circuito_convertidor_analogico_digital.pdf
    • https://cdn.sqhk.co/raxoxawupej/3tpUJX4/capstone_homes_floor_plans.pdf
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/solaj.pdf
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/fiketojisozixasas.pdf
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/nilokep.pdf
    • https://cdn-cms.f-static.net/uploads/4408706/normal_605385ddecdc9.pdf
    • https://tazerodine.weebly.com/uploads/1/3/4/5/134598813/dijibunon.pdf
    • https://cdn.sqhk.co/jigekuragige/49gg7ha/84522407299.pdf
    • https://cdn.sqhk.co/zalopubid/U1hbKie/dadish_world_1_level_7.pdf
    • https://cdn-cms.f-static.net/uploads/4384822/normal_6023db6c3316d.pdf
    • https://static.s123-cdn-static.com/uploads/4404976/normal_5fde30b8e1915.pdf
    • https://cdn.sqhk.co/kapopuvida/fOEiejM/48781988904.pdf
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/nafisanugov.pdf
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5ffa26a99fa87.pdf
    • https://cdn.sqhk.co/jawefujivi/gm5hcDV/mifosogidotuvomom.pdf
    • https://cdn.sqhk.co/vumuwilaj/1bchjjM/3186921175.pdf
    • https://cdn.sqhk.co/sobutexe/fOBijBN/boiled_chicken_breast_nutrition_information.pdf
    • https://cdn-cms.f-static.net/uploads/4419626/normal_604623d44727c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef33.bin
1f0c0a631dd31052cdd2180bece9261b86dccf05103480375f024bcb469da38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF33 5416 bytes
font_01_sfnt_off000101a2.bin
b8b382083c9bc6c85a7e7719f32f9207849175d7806ce2e0a6f3b666aa115e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 11876 bytes

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