Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29c2ed30b88be0d…

MALICIOUS

PDF

110.1 KB Created: 2021-04-02 02:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d52239a8f0258e21a0172668f08de56d SHA-1: 57868390bf95175fcab6e00f3e0354f601d9d7fd SHA-256: d29c2ed30b88be0d79c2714c4d83ba30acb6bb019fac176a009d7db79c285a1b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://resalured.ru/award?keyword=synergism+and+antagonism+pdf PDF link annotation
    • https://lovevupadu.weebly.com/uploads/1/3/5/3/135328586/powubez_jemew_murorute.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/89001998970.pdfIn PDF document text
    • http://navaram.online/avent_microwave_steriliser_instructions84s5g.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/fge8Pig/las_toman_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabumamuv/Ogfjc5E/54708826662.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://mixevome.22web.org/74661934318.pdfIn PDF document text
    • http://sfhgfje5df.xyz/42466962740adwgr.pdfIn PDF document text
    • http://rezotu.xyz/high_sea_saga_monster_hatching_guidecihxf.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/82232807513saxw2.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/4798552.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/48d4c8e9ca6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_09ef322f2f30408bb883278ab894ba8d.pdf?index=trueIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_b4aeae5989814ddf9a348286ba8dd554.pdf?index=trueIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_d70886b70ae94cab905c2100baeb90ab.pdf?index=trueIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_13b3ba1aa8084e48b81aed2af837ca40.pdf?index=trueIn PDF document text
    • http://wejelinemadagep.rf.gd/what_charger_does_ps_vita_use.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0C 5532 bytes
SHA-256: 1a328dadca6f6250901a99a69ba3713e5f6885b1c9854964ca50d5dba1bd4c3d
font_01_sfnt_off00016ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ECE 11612 bytes
SHA-256: a494f79472952962db88d25ff41939466fe96bcfb9d7b42e77bb56fe786ff974
font_02_sfnt_off000195e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195E0 16224 bytes
SHA-256: acf7a06de5d54d5ba0e953f9d946810ccc02efbad1fdc304b178a00b3c54ffe5

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