Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c724dddc772b4a…

MALICIOUS

PDF

57.5 KB Created: 2020-11-24 06:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f53c855d5f51cc26e5181b50a54c6b58 SHA-1: 9e4350fbad7658af434c3102471f90d80f137a33 SHA-256: 49c724dddc772b4a31d765e180683897bd00baa9bc11b07d3418813b08ebb305
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a technical data sheet, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=butyl+glycol+acetate+technical+data+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f9e18ccd2891.pdfIn PDF document text
    • https://tebamebameden.weebly.com/uploads/1/3/3/9/133997375/48b8e1b98.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/6131267.pdfIn PDF document text
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/tisulowugiduke.pdfIn PDF document text
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/2d73d0ac37f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f875886da11a.pdfIn PDF document text
    • https://tazaliraku.weebly.com/uploads/1/3/4/8/134884946/lomutaji_zefabapu.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/863886.pdfIn PDF document text
    • https://foposivore.weebly.com/uploads/1/3/4/4/134472686/vugasup-mitozowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5f93cc1648b23.pdfIn PDF document text
    • https://gavizule.weebly.com/uploads/1/3/4/6/134659779/raxeb_lozoraxokagib_patufurif.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/3584fed3-73e0-4b4e-ada0-5da9fb41321f/93540001186.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6AB 5256 bytes
SHA-256: 3d5f95962f7e255969ec657fedfe531ccb06c5785e1a6f1952b4599233eee4ab
font_01_sfnt_off0000b89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89A 9560 bytes
SHA-256: 3680a4adb3b5784cef8a99e4761248f28d786139aae77daa3b9cdc9bfae76c20

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