Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e4f6b4cddb8f3e…

MALICIOUS

PDF

67.5 KB Created: 2021-01-17 10:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 27fe9828f327fd3c06e1c610853e3ea3 SHA-1: 146c0cc4b767522b73d5dbd9906297a8ff756993 SHA-256: 67e4f6b4cddb8f3e86ec019e10b54071254067a57004f1773c0791c5361a9898
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://trafftec.ru/123?utm_term=how+to+print+multiple+slides+on+one+page+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fa7eae281240.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/606b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_5fd17825cdc08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f95c06fedad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_5fb837b7b72f9.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/672f172837c3e4.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/4287956.pdfIn PDF document text
    • https://site-1171694.mozfiles.com/files/1171694/wyze_plug_keeps_going_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5fd6fb6c6798a.pdfIn PDF document text
    • https://site-1172154.mozfiles.com/files/1172154/41957908533.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/fakudabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5fbf4dd37e6a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fcb6442292c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_5fc1606443ac2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92E 5448 bytes
SHA-256: c9413435b3135a97b29f26ff18a5b006b41b5e29c88e3667412702ed61966faf
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 10952 bytes
SHA-256: 03fae9e8d1edc5161c101e1f085c7bbfa1dffd4f9933b8f5e1ea33cffb6cb721

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