Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a909149537b5be0…

MALICIOUS

PDF

97.3 KB Created: 2021-05-07 06:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4229193efb57c8e09e5af3ea9b6223 SHA-1: 537daa84345777c72b401310bf52b3dde4c1c095 SHA-256: 9a909149537b5be0ca52025de79603e69e8be350cf1f8b34f2bf5b019bf612a6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded URL https://mezovuduw.ru/strik?utm_term=what+if+adam+had+not+sinned is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=what+if+adam+had+not+sinned
    • https://miteviwu.weebly.com/uploads/1/3/6/0/136006965/latefotagutat.pdf
    • https://static.s123-cdn-static.com/uploads/4491705/normal_5feb1003233e7.pdf
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/8434472.pdf
    • https://static.s123-cdn-static.com/uploads/4485705/normal_5ff76ed9e26ab.pdf
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5fe4e3d3ca44a.pdf
    • https://rebijigubewu.weebly.com/uploads/1/3/4/7/134770847/4959538.pdf
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/zadedemiravekejav.pdf
    • https://static.s123-cdn-static.com/uploads/4480414/normal_600032a0e226d.pdf
    • https://cdn-cms.f-static.net/uploads/4481397/normal_604e57114e36c.pdf
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/nosokezepaxigufobi.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/8529424.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donukadizolin/manualidades_faciles_para_halloween.pdf
    • https://s3.amazonaws.com/jawusawar/how_to_fix_a_car_with_no_spark.pdf
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_110f2997ac03404899fdce5407d6ae8e.pdf?index=true
    • https://s3.amazonaws.com/samopakamefap/lake_louise_resort_snow_report.pdf
    • https://s3.amazonaws.com/jivala/dudupufoguve.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_0519305a436a4ad3a7091cc355bd7d0d.pdf?index=true
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_6a2ef8305a604dd090879aa2f621eb69.pdf?index=true
    • https://s3.amazonaws.com/zewimu/waresaxukotuwujafeleno.pdf
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_0b289d43b336448f8a90e71b2af71e05.pdf?index=true
    • 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_off00013dd4.bin
1c0e93bdd4e89d96caf8814e58abc03ec9a16838c19f524c69d6e7c28c648e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD4 5032 bytes
font_01_sfnt_off00014ee1.bin
f0759afd89b83eef7f129f678c4179c3438522debf428cf9cf32bee877db8da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE1 11732 bytes

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