Malicious PDF — malware analysis report

Static analysis result for SHA-256 945facb094ca800d…

MALICIOUS

PDF

100.9 KB Created: 2021-03-30 03:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47262765c4616d79c29213252b3b996e SHA-1: 37da4b7e3871ebe99da3d5daa95ba97ba1cdbd81 SHA-256: 945facb094ca800d592467a965e49fd1b4fcb2ceac7eef989f30a1767e27e5b8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9981

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://lozipotod.ru/strik?utm_term=superstar+3900+eft+service+manual PDF link annotation
    • https://nafesidupige.weebly.com/uploads/1/3/2/6/132680955/melubodulowawu.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/3297027.pdfIn PDF document text
    • https://bolegabafewibe.weebly.com/uploads/1/3/4/6/134651697/a38dc1.pdfIn PDF document text
    • http://qrastenmap.online/40234213516bbl51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_605b8b436b14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_601a046a1de41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_60021500916b0.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/i2QXtgf/pufinelefuzupezug.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/dosizajoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_6027b53b91cf6.pdfIn PDF document text
    • https://serijarivak.weebly.com/uploads/1/3/0/7/130776739/bizigasow.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/ZU3U0r6/fanoruru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5fe433041a49f.pdfIn PDF document text
    • http://goldotzyv.ru/pimuraviregemivomunesleyoz.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/ninubebalabo_wiviganezok_sodigirove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagijonegularol.myartsonline.com/audio_cables_and_connectors.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_04addb136fdf479a8d57310bbee3ea0a.pdf?index=trueIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/thule_bike_rack_strap_failure.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_3ea6b5a793fa441b8d3551971586b1ce.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_20a394f6d4444aafb8e2d94ff55408b3.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_767b440d2a854966978c140610f56797.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_9ad4c756329c45a885b29f59b71ca06a.pdf?index=trueIn PDF document text
    • http://dowafirowelumex.atwebpages.com/3838742232.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001189a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189A 4300 bytes
SHA-256: d2c2f16adde8275344c69e5f3b633fd807d909148dec5e9027adbaca741cf8b3
font_01_sfnt_off000127c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 5788 bytes
SHA-256: 59ca1d2e2dd34defc2b3d9ae639a036d4ba194386f1e40d6c6e8f18e6889bedb
font_02_sfnt_off00013b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B66 16348 bytes
SHA-256: 4b63d30ca97710aa549101924367658bc9412b76ac07641453d92efa7f9e3550
font_03_sfnt_off00016b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B07 17232 bytes
SHA-256: 6cd6c3d07c679bf519e5786046352afd3bee2a4475afed4e3b9892c346c59ef5

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