Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2f6313c2df1375…

MALICIOUS

PDF

76.9 KB Created: 2020-12-28 16:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 70f4054881f0dc1d88df0219a5f63887 SHA-1: ffbc911179a6e106a4da04a0f8d16cf3c579ba15 SHA-256: 6f2f6313c2df137587a80c1481335f9b1679ac63dc0f0154c6fed8a5ed315288
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme designed to lead users to malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=hidden+valley+ranch+potatoes+in+instant+pot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5fa9415a9c5c8.pdfIn PDF document text
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/6172864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fd89b04ea6bd.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/wapisazadulox_ledadiw_dixodafekewus_lasaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f9661aab70ce.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/xelojakijikev_suxavunu_jitomod_zetawavuva.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/RTsUgMe/44410382041.pdfIn PDF document text
    • https://pijuvadugodawa.weebly.com/uploads/1/3/4/3/134307721/xirizire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fb83fd807ca2.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/aBhiif4/shareit_app_store_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f88624192689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/facebook_app_from_google_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/the_lighthouse_full_movie_online_free_123.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5284 bytes
SHA-256: 565eea96c65a55fe086e0b7270e9accce3737394354f5ca87eb9e0a0128dcf4b
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 11640 bytes
SHA-256: bb84bbfe3d1bd479dbefc2f4320a852499d30ec380090084df12521431c0379b

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