Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6205e6e03ad02a…

MALICIOUS

PDF

78.5 KB Created: 2021-06-02 02:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bc6ef79fd80acd075da830f62070cf00 SHA-1: 1870e5e707d1c74115662562d9e853f5d396da23 SHA-256: 9b6205e6e03ad02ad47e53f65f7b7d3800104e54b5c67757911c7e7fc433068c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. No scripts were extracted, but the extensive link farm suggests the primary purpose is to redirect users to potentially harmful websites.

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://huntic.ru/pbw?utm_term=how+to+print+multiple+slides+on+one+page+pdf+macbook PDF link annotation
    • https://dozosiwogaw.weebly.com/uploads/1/3/3/9/133989014/wemira.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/rosapuja.pdfIn PDF document text
    • https://tedunifadikave.weebly.com/uploads/1/3/7/5/137505165/penutugirivus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_602798e2b3614.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/keroboxefobanix-mekaw.pdfIn PDF document text
    • https://juxufosuzuvol.weebly.com/uploads/1/3/1/4/131437906/7141855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5ff13deda031e.pdfIn PDF document text
    • https://kuruxodevudule.weebly.com/uploads/1/3/4/7/134728431/857934.pdfIn PDF document text
    • https://dumiwexadanona.weebly.com/uploads/1/3/4/5/134522913/nipilejarulubow-fegorifosafoku-bilom-dafedusex.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/7fa32100-c550-475b-a9ad-8136e7819b48/traxxas_t_maxx_2.5_axles.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144449496/kopukasarukurinas.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/new_kicks_shoes_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba25d557-3957-48fd-8635-3d8228135495/pofosalujubarazutewomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d993d2-6899-430a-9c7c-6ecf36fcac39/english_to_swahili_translation_dictionary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a4d62a-7e0e-4cb9-9f0e-75d98605b3be/how_to_fill_child_passport_form_online_with_example.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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5732 bytes
SHA-256: f3aae545995b7a97b7582be3773868d7584a906cf17384ff6a5e62d6dfc653eb
font_01_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 11284 bytes
SHA-256: 7761ae9c20f2fcaac49c388d382d816b47a8eb5d2fbd4fcbbccbf81264321c3c

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