Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e19fe1c32e262c…

MALICIOUS

PDF

69.0 KB Created: 2020-12-24 10:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 46c488c7d42a9cffdb97c1c09acd1120 SHA-1: e9af1ec85a9608ee2b985b1f69b5d9b705151f38 SHA-256: 35e19fe1c32e262c2a54846a21d107f5d4ef01ab787682d4434f2f6458fbef50
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of multiple external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://traffset.ru/strik?utm_term=big+blue+marble+coral+springs PDF link annotation
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/3b246.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/seramu-lotiwudemu-goluwunun-lilolujaxosi.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/837abc678a.pdfIn PDF document text
    • https://mominebokax.weebly.com/uploads/1/3/4/8/134899741/gibebodit.pdfIn PDF document text
    • https://zuwuloju.weebly.com/uploads/1/3/2/6/132681456/95f26.pdfIn PDF document text
    • https://busixixadivuteg.weebly.com/uploads/1/3/4/7/134709325/f179d32d180.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/kuvutupitetitabiwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366358/normal_5fc8f30a206f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fcdd3088c2b7.pdfIn PDF document text
    • https://kelunegitafisi.weebly.com/uploads/1/3/4/6/134625524/9522037.pdfIn PDF document text
    • https://lenukanaferu.weebly.com/uploads/1/3/0/8/130873899/6575607.pdfIn PDF document text
    • https://xesusilinani.weebly.com/uploads/1/3/0/8/130874458/5ffb8c414a147b.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/4457659.pdfIn PDF document text
    • https://bajomunimiru.weebly.com/uploads/1/3/1/0/131070213/9158822.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
    • 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_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 5244 bytes
SHA-256: 1761c4191f3c913c28d655b70fda862509648011be35fc75c69d792cbc478309
font_01_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 10180 bytes
SHA-256: c616f3fda536d17dd4d21ac4f7f971ad39be9e04cfb956c3e393f2de33723964
font_02_sfnt_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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