Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7c9aa062cd9553…

MALICIOUS

PDF

80.4 KB Created: 2021-05-11 03:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fb768a8855c8d5f7e3154e715eea7ce9 SHA-1: 06f855d8532a209efe2b0c20a1fb8481986e9206 SHA-256: 2e7c9aa062cd9553586c907f5fad358e074c1ee08c95e10b35754260ce5c99ac
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to a download disguised as a Windows 10 upgrade assistant. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm on disposable hosting, further reinforcing the malicious intent to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=free+download+windows+10+upgrade+assistant PDF link annotation
    • http://grigolia-studio.ru/beginning_lyrics_by_joevedvm.pdfIn PDF document text
    • http://2gusevshop.space/207351383392c4ct.pdfIn PDF document text
    • http://websporizle4.com/is_silver_good_on_workkeysq6mj4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_6028063ea89e9.pdfIn PDF document text
    • http://kittyplay.online/how_to_find_number_of_atoms_in_a_given_massyhczr.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/ifi5Zgd/vovovadomifojike.pdfIn PDF document text
    • https://cdn.sqhk.co/fagevibe/ggdZogd/3515027632.pdfIn PDF document text
    • http://sehq.xyz/how_to_remove_norcold_rv_refrigeratorbsbve.pdfIn PDF document text
    • https://cdn.sqhk.co/dujuxafetot/dggifIC/11485323442.pdfIn PDF document text
    • http://connexion-amelii.xyz/66907737143l3ulj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471479/normal_605353913028f.pdfIn PDF document text
    • http://klyshsheff.xyz/formulas_de_geometria_analitica_elipse0rcoy.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/french_society_divided_into_3_estates6tray.pdfIn PDF document text
    • http://yoganchik.space/726675422u3izk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_c9e87bd0b726421a92855cff98738781.pdf?index=trueIn PDF document text
    • http://tesepesizaz.rf.gd/act_grammar_practice_worksheets.pdfIn PDF document text
    • https://9e6c4f0b-3406-4274-bf8a-5be7f948d240.filesusr.com/ugd/45c6ff_f717ec96e6ad41c885a351e96a451ab3.pdf?index=trueIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_13c7f4ee94a54c43bf9b18bc8467f0fd.pdf?index=trueIn PDF document text
    • http://sugunava.epizy.com/what_questions_to_ask_recruiter_during_phone_interview.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_1d787d5bd8be40ea974cc763afdefd5b.pdf?index=trueIn PDF document text
    • http://lumaradidufil.epizy.com/sat_chemistry_princeton_review_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 5368 bytes
SHA-256: d3e383f32510efaf7e9fc5572921351bf5bec252c441c93c4a5c3b6fe128816c
font_01_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 11076 bytes
SHA-256: ff5d9f752744c085ce14945dd32a1aa5637e7d26214454bac0fae5636d8beed4
font_02_sfnt_off00011e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 16252 bytes
SHA-256: ca8803ab54afb9ca6598605af7ed4e11ae34d9999b43498998e2cabb18644971

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