Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0f7bdda75cde15…

MALICIOUS

PDF

74.4 KB Created: 2020-12-26 09:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba1a38d709746f972384ae0dc169ffc SHA-1: 18bfa3dd8c5e14ff58e77b3f0f9b2f3d2ae68e91 SHA-256: 5f0f7bdda75cde1545daa20e294ada5e8aa4e7a53441ba55baac1f614523b817
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with critical heuristics indicating it is a phishing PDF and a link farm. It contains numerous external links, including one to 'traffking.ru', suggesting a redirection or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=ff14+crafting+macro+builder
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/d425d2dcfa4c7.pdf
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/5521153.pdf
    • https://cdn-cms.f-static.net/uploads/4425723/normal_5fa193d5f0b31.pdf
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/newumogerasewesitojo.pdf
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/dapov.pdf
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5fb2e2cc97016.pdf
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/renotefomoxi_lanifejogem_tomubupuzebapi_baniz.pdf
    • https://cdn.sqhk.co/fekawifen/bamRRhc/41155297997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba40b19c-7846-4299-91bc-07730841e15c/dieta_los_13_dias_original.pdf
    • https://uploads.strikinglycdn.com/files/be092902-6001-46ac-8de6-adc6e175c1b9/bonirajesidetaxegizu.pdf
    • https://uploads.strikinglycdn.com/files/45140614-1d16-4ad5-82af-d3fbd5aa6475/sewuvudilivilebuleji.pdf
    • https://uploads.strikinglycdn.com/files/eaa5123e-112e-4e14-914e-8f93ac11ece7/7259682201.pdf
    • https://uploads.strikinglycdn.com/files/a259e774-d5f2-4d7b-b09a-0cac1290ad67/80002233914.pdf
    • https://uploads.strikinglycdn.com/files/57ba716b-fe2a-4ebb-9251-a0d5c337c766/29099761733.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e131.bin
d60f48645746f946ec1c2a2fc236ca23893880af66c868a226ebc4c9c259feea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 5396 bytes
font_01_sfnt_off0000f384.bin
ba9cec3ccabe048f069d5d7531bbeed30e9c7b15686c29d4c05697024dcd6181
pdf-font-stream PDF embedded font (sfnt) at offset 0xF384 12160 bytes