Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18872090bf81526…

MALICIOUS

PDF

74.4 KB Created: 2021-02-15 17:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fbda25726f64deefc1a61c3b1274ceda SHA-1: eb43ad14e998f17b40b1fca7fc7ca89207bbab7d SHA-256: e18872090bf81526299dbf4c4c6f2006f5642102bc53574997d4d90d2c9ab4cc
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as search results for common items, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious redirection or exploit delivery mechanism.

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://bologen.ru/strik?utm_term=garmin+vivofit+jr+replacement+band+jb+hi+fi PDF link annotation
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/gepewotededesata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_6015ad80b400e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_5ff5ae7ceaf33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_60216d5d7999b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459640/normal_6013c4b4092f9.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/53c505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_6009944d15ccf.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/440b02f14dbfa0d.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/sitok/baldin_de_gelo.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/56185476752.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/26130148362.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/10404310604.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/61944020599.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/melifogonofetegopo.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/sample_cfo_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/bubba_blue_bamboo_bassinet_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/latest_adobe_flash_player_standalone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/70231359565.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/judutizoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/rebosapedoj.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/vajowili.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_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 5524 bytes
SHA-256: 3ee64c6a2351c2fdf78180488414f56289eeeff083d08a18dce2e4fbe23691c9
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 11596 bytes
SHA-256: 83777622b6a21513ff646693b6922d037b9b64dbf71b8d8edf47acc0111ffa26

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