Malicious PDF — malware analysis report

Static analysis result for SHA-256 810f65c4bf32f959…

MALICIOUS

PDF

66.9 KB Created: 2020-11-24 18:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79f30bdb568f8a1494221649edc4d8be SHA-1: 751af633534f7c52322e932a0ae660918d6f6aed SHA-256: 810f65c4bf32f959d20c74127410e33f6195626defcbcf7c1509b5460a0b2c9a
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to manipulate search results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded links point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=kanban+board+excel+template PDF link annotation
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/novexutusosikaj_jarulete_luwevadopap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fbceaa87484a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8778c5c69d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86f611b-afc0-4df3-884c-dc98f7f1ec10/2308502994.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/rozujuzujuxarow.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/new_super_mario_bros_roms_mania.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/mexubukuzexefat.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zukaziteg.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/6891356682.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/nedalobezuruw.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/28985879824.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/52538526665.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/chestnut_tree_day_nursery_ofsted_report.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_off0000c8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A9 5216 bytes
SHA-256: c329db4fe4d7277a96cc0bc78516c5437d6e07f91d04a9034a0da7c9f82852b7
font_01_sfnt_off0000da55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 10848 bytes
SHA-256: 5f7af72c9eb8bc3a8906f285791ef276fb2ebee4cd528010cedcec1f144d87dd

Open this report in the interactive analyzer, or submit your own file for analysis.