Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbcc73c11559bcc…

MALICIOUS

PDF

69.2 KB Created: 2021-01-23 11:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c696a2547bfcd9321c40cafd8c0cc690 SHA-1: a217ffe9fa53a2e0af662e7dc566d906043d9cbe SHA-256: 7cbcc73c11559bcc852d0a2e99314c2f7895dab28aa9ddb4a75500fc4b1fc0d8
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a high concentration of them pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, contains text related to a 'reportagem do globo rural', likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=reportagem+do+globo+rural+de+domingo+passado PDF link annotation
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/pituwaga.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/lijepalamepefezes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409110/normal_6003b7156d1e4.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/wojed.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/1505288.pdfIn PDF document text
    • https://tumazalewiguta.weebly.com/uploads/1/3/4/7/134755417/rizitusab.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/lebemasuvuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5fcff48deffde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fd3d1117d487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_6002f08f741f4.pdfIn PDF document text
    • https://wiwujakibites.weebly.com/uploads/1/3/0/7/130740442/tasukomadupor.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/jefobexapulow/aliens_1986_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/arthanari_film_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/98083104019.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/81008115179.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_off0000d00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00E 5424 bytes
SHA-256: d92ef41d64e998f5358d2f2951536ad7bcba2e2d87cddd2b6f4e8a779f11f2be
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 11588 bytes
SHA-256: 851a582c69b57537fd3b229a056fef439bd15620d9b5fed1d7fecb5f8a500b99

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