Malicious PDF — malware analysis report

Static analysis result for SHA-256 7836148f15387626…

MALICIOUS

PDF

71.8 KB Created: 2020-11-14 00:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 22a5826d1e85662100b6f9021237d2f4 SHA-1: d6f2930d0ffb0b417dced87524c379d07768d0ea SHA-256: 7836148f153876267747319ffe5141e722334e62e69fac57b8f33f6f5bfb48c8
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9938143.pdf.
  • 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.
  • 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://traffine.ru/aws?utm_term=2008+acura+mdx+performance+parts PDF link annotation
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9938143.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/6454166.pdfIn PDF document text
    • https://jopizogado.weebly.com/uploads/1/3/4/3/134317888/3cc04.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/957739630ba.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/rowomis.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/meliwazegozopukudufo.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/gatanokaval_supirawufadik.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/xufaxoferugod/whatsapp_gb_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3b7c61-de15-4c02-86a7-65a5554cf598/25677406340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ca05e7-d53b-40e5-b8f8-9dbfd034af03/weradogokozobagokikuvas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8a9c5f-c6bf-467e-89cb-cf9eea6ce8e9/teputodadega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf55905-a9db-4569-8462-082f063057d2/82125248290.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 5708 bytes
SHA-256: aea751e25477ef2df77ad0de86ac3309acf0652883b5c4928dff0f44a79d8233
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 10860 bytes
SHA-256: 66d22a94867bb74ce15ecbb7301fcfa829d6311ca8d6880947030a914acd7b60

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