Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5050d374188503…

MALICIOUS

PDF

80.9 KB Created: 2021-05-03 12:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 573888d219b4f95e2eec06ca52b10ffb SHA-1: ed69afc5782ccc67e61962753096842a5f1a839f SHA-256: 3d5050d37418850385a6798c59eab185c192ba6b477a16b610164f1a8b54c1aa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm designed for SEO manipulation. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains fragments related to technical issues, suggesting a pretext for directing 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://fokemale.ru/strik?utm_term=elgato+hd60+pro+not+showing+in+device+manager PDF link annotation
    • http://yozi.store/vakukscy8x.pdfIn PDF document text
    • http://reliables.ru/free_sample_sales_action_plan_template2hwlv.pdfIn PDF document text
    • http://erkutungotu.com/bosch_nexxt_500_series_dryer_not_heatingduefc.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/lLghG49/nintendo_3ds_legend_of_zelda_majora_s_mask.pdfIn PDF document text
    • http://all-casino.xyz/datenjzgc3.pdfIn PDF document text
    • http://teleporttur.ru/loseselerekugemida0sxwf.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/2392624966493y5u.pdfIn PDF document text
    • http://espaceabonne.com/77204346353cicjo.pdfIn PDF document text
    • http://ribupisid.22web.org/zusovufonokopijosefep.pdfIn PDF document text
    • http://svoydvalend.xyz/plants_zombies_heroes_puzzle_partyy44xf.pdfIn PDF document text
    • http://relax35.ru/jivuzazira7mfu6.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/9zprhcU/xoludomukejar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d85b1738-a471-4043-b59e-116b2bb794a3.filesusr.com/ugd/97927e_a5d9c8fd816a437a837840ef02dfbf92.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_ec77c509979c4cdbb605ec791a5cb22a.pdf?index=trueIn PDF document text
    • http://poruworetizilu.epizy.com/41821165309.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_4c22cbd3b8c64d0d84ce43a616ffc727.pdf?index=trueIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_ff77a8018ae546d98173b87dc4415ce1.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_a8a3ce8176524dc3b6bb57719d01065e.pdf?index=trueIn PDF document text
    • http://wabanatebaxu.epizy.com/46317848215.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_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 5892 bytes
SHA-256: 2436e70ce7f3d1c01c5c8167171bb94f43613c29f697a0edad7fb35f8aa0fd5a
font_01_sfnt_off00010fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB6 11388 bytes
SHA-256: fbe079a8ada37cb53c1ad2b6218660f6f3a66ce4aaf941853e3a0a8943cf84da

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