Malicious PDF — malware analysis report

Static analysis result for SHA-256 209dc0d9fa65dcac…

MALICIOUS

PDF

82.9 KB Created: 2021-03-20 01:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ab5a4d6a28ba4b8b0f4b95f87db05f7f SHA-1: 21253c5ab0dabda48392722b82acb8fd5ad8423a SHA-256: 209dc0d9fa65dcac7d78f4ff8c9a4d1285e1790a3da10d7a753efc76f8383330
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, likely serves to redirect users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://maypoin.ru/strik?utm_term=survival+skills+books+pdf PDF link annotation
    • https://nezasofesaz.weebly.com/uploads/1/3/5/9/135961661/3775201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_601853e68c548.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/kupozememarino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_6034cfee5d5ee.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/if2hLgi/54463621945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_60201afc74eb1.pdfIn PDF document text
    • http://899themes-demo.ru/kathi_mela_kathi_song_in_isaimininela4.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/cePherh/lavox.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/df8fe94aabf.pdfIn PDF document text
    • http://iranomics.com/jobigapakamgduu4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416506/normal_5fe31438915a5.pdfIn PDF document text
    • http://1-bog.ru/5938028414754e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471256/normal_6050325a6b061.pdfIn PDF document text
    • http://luxshop21.site/xawudesupupepigoremso0iq.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/hFgjvgn/pofokogesevizarul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_601e48e5a080a.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/zutoxuguwat.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/iabibia/50053569582.pdfIn PDF document text
    • http://service-hire.com/how_to_assemble_a_10ft_trampolineh2ubg.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/datol-zemopekis-mawobefuxiruxol-sufevipefesav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd67978620fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5fd9044d42899.pdfIn PDF document text
    • http://torchqbfl.fun/logitech_harmony_350_remote_battery_covera8701.pdfIn PDF document text
    • http://vezerfa.xyz/business_plan_powerpoint_template_microsoftjt7fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5feb0dc0a0a5a.pdfIn PDF document text
    • http://normaa-id.com/convertir_pulgadas_a_centimetros_onlinepw4xa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 5404 bytes
SHA-256: 6ba565246f2204ce47fcee82eb2bf066f19515d16bcabd7cfb4e99cc185f374d
font_01_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 11000 bytes
SHA-256: 0ad4464b70fe18d086dd7c997220ec77a01509e5926eba1e9d7c9eb438158567