Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fa05186c4b39ee…

MALICIOUS

PDF

73.7 KB Created: 2021-03-29 07:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1eda0abada152b90c2ff6f12aa5916c0 SHA-1: 4e9b51351cb09ad87233b5dc473b5d1846f955b4 SHA-256: 68fa05186c4b39eebe3d46f8ea4bb92a98ffa2b165e0fe911f2ab0e05fc70283
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 trojanized nature. It contains numerous embedded URLs, suggesting it functions as a link farm to distribute or redirect users to malicious content. The presence of 'utm_term' in one of the URLs further supports a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=special+forces+group+2+mod+apk PDF link annotation
    • http://rabekapudi.iblogger.org/o_level_mathematics_notes.pdfIn PDF document text
    • http://repovor.22web.org/mapogixexebuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5ff7d478c5325.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/dfDjeih/barbecue_chicken_breast_on_grill.pdfIn PDF document text
    • https://cdn.sqhk.co/mumepefofise/a83ggYp/70027660469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fd60f991a425.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hhhpjbd/my_talking_cat_koko_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/Z7XnPC1/29066744667.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/ibrwid3/66239047042.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/chfihjb/46780781475.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/zjeapiy/hard_boiled_eggs_in_pressure_cooker_no_basket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_5fdec464e189d.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/Qjgsr7U/drop_it_low_for_jesus_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/uEia1ij/anime_girl_dress_up_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_605a66b073d91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859821/normal_605110a07ac27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukujixi.epizy.com/cv_assistant_comptable_dbutant.pdfIn PDF document text
    • http://rexalovujomorox.epizy.com/luzawujowoxinupebuwexunem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc41ee53-2840-46db-b60d-31e23d9d23a9/how_to_become_certified_internal_auditor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a9f182-b9fe-43b1-b687-f4b8de623c8f/23036053484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3727025e-8f0f-4cd0-abd7-5d99980eb5c1/lg_gs290_sim_unlock_code.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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 5776 bytes
SHA-256: 18065181dafc024598f0565839b9860e18e9c8f9868eb2f91ded1609e10e3fa4
font_01_sfnt_off0000f78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 9916 bytes
SHA-256: 471090b8249be0601e41c05e1ada44a4bee87408d20bd608f5e17f77bcbda811

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