Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6a85cd1acca88b…

MALICIOUS

PDF

64.9 KB Created: 2021-04-15 09:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a54d85bcc0e45825fb3e30d5dfe78a4 SHA-1: 4ec60d54c62687eed42097e878c62b9e2647c106 SHA-256: cc6a85cd1acca88b1ee77cfe09ab8f666541c79e6b000f7bb27c097588a7b91a
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 0.9998

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://gimoguvi.ru/strik?utm_term=the+art+of+leadership+5th+edition+pdf+download PDF link annotation
    • http://pofaduxiruk.getenjoyment.net/husqvarna_440_factory_carb_settings.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/9266199354.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/2583300.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/wexesamozubowoz_kevogexikarare_momezew.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/46360765344.pdfIn PDF document text
    • http://ziwavabewite.66ghz.com/draeger_breathing_apparatus.pdfIn PDF document text
    • http://nutigunejome.22web.org/manuscript_template_for_springer_journal.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/kopusevoxepogor.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/simple_budget_forms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f7b0ef4b-317e-4f07-901b-4de91a029b50.filesusr.com/ugd/50f142_b0fc6a51285b4d859ccc650e7024eb0d.pdf?index=trueIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_485ec78808964496a7ed83970391f5ad.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_64ba59bad8d6457cae70b70574db1a53.pdf?index=trueIn PDF document text
    • http://favigagiwu.epizy.com/change_to_word_document_mac.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_5aca443848884f92baa670786c3b611f.pdf?index=trueIn PDF document text
    • http://wufikemofumop.atwebpages.com/sarasaralusijofulafuxa.pdfIn PDF document text
    • http://pavinudoj.epizy.com/42013431670.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20C 5296 bytes
SHA-256: ff1be9c708de4f36a911a88bb9b65a8a1f1cec6ec73c1b73ca97b8561e311040
font_01_sfnt_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 10092 bytes
SHA-256: dfa23e1b778583f25c64ecadaf7acae4f1717234435ea63e460844da5aa40cd6

Open this report in the interactive analyzer, or submit your own file for analysis.