Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9946810040410e…

MALICIOUS

PDF

63.8 KB Created: 2020-12-23 08:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d8b261080f7d0e7ae0cf4c7d9ac7ed61 SHA-1: 77e9474baf91fa16c1762a7e4a502f3f6e72ca46 SHA-256: cf9946810040410e22a487b833dee6e09845c831c6a0fa63fcc64ced46b33ee1
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is weaponized to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=wella+color+charm+gel+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_5fad67919ce72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f8e94f139119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f870107c8364.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/kuxapi-rafagijin.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/nerotokufatito_noduz_jurafepe_pavejid.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/vamefuxuxufib.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/vojubesugibafudijani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e5a45047-52cb-4811-9b02-0048358b319e/vawolujugoferafejizemevos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a3b7a5-0e7b-44f8-a3ca-a3f1549484b6/lobuxorajawijajubo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc595465e8e827d42adb05d/t/5fd744a089566e781f6ad5fd/1607943329700/sejikixemagubagideb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb5fcd8-166f-457a-9853-b55ca55ad98e/lidebixogakeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f37f5a8-d69f-4e32-b841-44e5ad4e43b8/wajugasubokawivokomuwiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15862f5c-008a-4c34-a601-dcf10a45f5de/64874363017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e621724c-b8b5-41fc-aedb-11029aafc29a/72087226547.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AE 5108 bytes
SHA-256: 323d5eb689b170dcddf9fbee393a2681338908b0f3776c764f72fa6d31133509
font_01_sfnt_off0000c2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F2 9348 bytes
SHA-256: 68c231e09850f3cbb9b8f0cf54a645592a6df45d862ba902a4a9730a52485c72
font_02_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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