Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece7fd62c86eb9e4…

MALICIOUS

PDF

73.9 KB Created: 2021-02-21 09:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 37b545866e0b4bc806c6ea9150cd10a3 SHA-1: 417a3bf18f3583ec931d60717d3c2aaded870495 SHA-256: ece7fd62c86eb9e4e48fb28267e4a5c7383bf5d3bafd18985a553664641f3ec0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a link with a 'utm_term' parameter indicates an attempt to track user engagement with potentially malicious content.

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://bologen.ru/123?utm_term=how+to+write+a+descriptive+essay+examples PDF link annotation
    • https://jojipizi.weebly.com/uploads/1/3/1/6/131606457/9174397.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/jepupitap.pdfIn PDF document text
    • http://onlinetiser.website/camminiamo_sulla_strada_spartitocdj50.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/nagatirufuwoxaxn6dld.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/jaxoliwabudi.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/riniwujadujuj.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/fadapepu-wuloxapupelup.pdfIn PDF document text
    • http://ag-management.space/fallout_shelters_near_me523xt.pdfIn PDF document text
    • http://ooovseanalizi.ru/74749682151tmiac.pdfIn PDF document text
    • https://tazidafojunuxu.weebly.com/uploads/1/3/3/9/133997245/6041540.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/747910.pdfIn PDF document text
    • https://bipagaposelugi.weebly.com/uploads/1/3/4/4/134479594/zufimuwuriviwi.pdfIn PDF document text
    • http://tirudibemaj.22web.org/69801588550.pdfIn PDF document text
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/goxamupudigagi.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/6923394.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/fadozorowelazenexiv.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/kudowo/japan_guide_tokyo_metro_pass.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/63663251892.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/daterotosu.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_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5504 bytes
SHA-256: ede45af554b6bb2d216e02097d640d486dea4a646c0bc620949d34b8e0d58b54
font_01_sfnt_off0000f71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71E 10176 bytes
SHA-256: 079a390a6751f3735d6eef3adab709d7d1f53eadd2f3bdd301712d583d78bc3a

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