Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11e5a24d64ecc57…

MALICIOUS

PDF

76.2 KB Created: 2021-02-27 04:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 78e0bc9a00d684b7cf38af6e1ab6c61e SHA-1: d9a60a60a82173bfcb36598f7a5f60481cf9ca77 SHA-256: c11e5a24d64ecc57e061ad77f750596cb8e08adc6a7acece6ae3c403bf815e9a
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate a social engineering tactic to trick users into clicking malicious links, likely to download a second-stage payload.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=absence+de+quorum+assembl%25C3%25A9e+g%25C3%25A9n%25C3%25A9rale+association PDF link annotation
    • https://cdn.sqhk.co/dajebala/aVijkgc/tufenutasemigevaza.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/c943392c31.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/6d23f.pdfIn PDF document text
    • http://tujofuzenej.iblogger.org/54052867623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_60064e2a2c7be.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/lopadivupudexa/netflix_android_8._1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/whatsapp_aero_v8.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/kerufeveriwemef.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/wallpapers_for_android_dragon_ball_z.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/race_car_free_printable_coloring_sheets.pdfIn PDF document text
    • http://govatojajij.epizy.com/bareilly_pin_code_list.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/moviledizamugekugoliripi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/dukezexufujadituzaf.pdfIn PDF document text
    • http://nixevafuzija.epizy.com/96802980653.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/seleranolulifa.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_off0000e783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 5656 bytes
SHA-256: 820a972c81ec370a538976eabf021dd16fbffe862922279a6099e583907f2ebf
font_01_sfnt_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 12364 bytes
SHA-256: 87471f30499005f817f11a440e3ea489ce4cd09374c412f32093ef37352db88c

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