Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1fd3f25f41ea37…

MALICIOUS

PDF

72.9 KB Created: 2021-02-24 14:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 37bde1dbfe3251e394470af94d159225 SHA-1: 99b003da5f83cc8cccb73a5ff0464aed4e015b6a SHA-256: 7b1fd3f25f41ea37422d45130a23900174fa37cd244be3bef4f2f011307de203
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable hosting services, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=amanda+the+pig+saw PDF link annotation
    • https://relabibede.weebly.com/uploads/1/3/2/8/132816075/newesusazalevuxelad.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/Ljhzgfj/race_king_protection_vs_racesport.pdfIn PDF document text
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/xivipolitiguku.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/SHgdUWl/guess_the_movie_quiz_level_15.pdfIn PDF document text
    • http://zawezumibinigot.iblogger.org/jofuzeloruri.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/texudutexape_jetumumime_sitinewapafiba_nezidemesi.pdfIn PDF document text
    • http://felidefewipikig.22web.org/74723168265.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/116610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_603249352cfb2.pdfIn PDF document text
    • http://dirtygirl.fun/ejercicios_de_neumaticaqya0n.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/i9ggMjQ/dark_dungeon_survival_pro_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/ifs5gdV/dragon_pxv_goggles_lens_change.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/kavudaporop-zofifekoxo-mijewifuzibaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_6020c1e7ba78e.pdfIn PDF document text
    • http://circulshtangcalip.website/jeluzani934k.pdfIn PDF document text
    • http://train-home.ru/58171249059ucb2l.pdfIn PDF document text
    • http://vash-komfort5.ru/best_uk_driving_theory_test_app5tuot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezonoret.epizy.com/sodium_acetate-_acetic_acid-_formalin_preparation.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 5328 bytes
SHA-256: 3e52d0c19b272751b3d3b19803b6c336c0812e49372795620cab04b20820f8cc
font_01_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 10372 bytes
SHA-256: c88f27ce5f3d41aba9674835152e5ecc161eb512dbf4e6a92f2081dcbb31749b

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