Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35f20ae933e6037…

MALICIOUS

PDF

82.5 KB Created: 2021-05-30 08:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 022cff890c624b9ac9bb13017ace74e2 SHA-1: 82d1a371d6a9dc3e71e566bdfa9a87e86954b0ac SHA-256: c35f20ae933e603747baf6afa85083bbc76728148e3e2f35b0e0116bd996d6d0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs likely lead to malicious content or phishing pages.

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.
  • 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://baarspo.ru/strik?utm_term=what+is+ir+extender+cable+samsung PDF link annotation
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/2816390.pdfIn PDF document text
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/piputuwu.pdfIn PDF document text
    • https://xafafiseroferop.weebly.com/uploads/1/3/4/5/134525648/kuxut.pdfIn PDF document text
    • https://volikupiwete.weebly.com/uploads/1/3/4/6/134676366/9725424.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/jimatijedexov.pdfIn PDF document text
    • https://ditutemisa.weebly.com/uploads/1/3/4/3/134381329/kamateneva_vosawupakilopa.pdfIn PDF document text
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/zerax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5ff330ad83c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_605f7b02b8fc1.pdfIn PDF document text
    • https://sezowizubuv.weebly.com/uploads/1/3/0/8/130874308/feberuvifa-nanavotox-risan-tewol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5fed56500d409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402504/normal_5feb0c6129f9b.pdfIn PDF document text
    • https://vadewowiruku.weebly.com/uploads/1/3/1/3/131382700/xazeburalab.pdfIn PDF document text
    • https://tiputanamadavok.weebly.com/uploads/1/3/5/3/135314880/kenamovubet.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/2509061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fcd762137036.pdfIn PDF document text
    • https://danevetiwa.weebly.com/uploads/1/3/4/6/134600357/revoroxejizepov.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/1af7b2d7-b7f8-4b3e-9a5e-2588ac24a4a2/36736172522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a516eae1-5343-4646-b4b0-9c5af00417b2/wirobowewezupukubisopat.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 4296 bytes
SHA-256: 8a1a785682c70a81c71fb22a2770b65a43adf2d8f172cc1bd271dcee01f4ccf3
font_01_sfnt_off0000faca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 5572 bytes
SHA-256: 612377a69e96e02353b3e14c50ca7a6590eeed9a0549e6033b6691bb7d28cc18
font_02_sfnt_off00010da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA0 14184 bytes
SHA-256: 2987d8ebb374457b8409ed5bcaf153b30d71a275b394f188bb7e24440cd6894b

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