Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef3c9d4508e73de…

MALICIOUS

PDF

87.6 KB Created: 2020-12-26 21:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 13c732885c21b3aa74f88a5363d362f1 SHA-1: 690071fe9525f0f54a0456d8753b24976d050f6a SHA-256: 7ef3c9d4508e73dea457c3d995a3e8fb4c1c37dce0c42c10d3c1f65ce2908d22
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://traffine.ru/strik?utm_term=real+football+2012+gameloft+mod+apk`. This URL is presented as a download for a game mod, indicating a lure to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=real+football+2012+gameloft+mod+apk In PDF document text
    • https://cdn.sqhk.co/tumozaraf/hfaocjj/wedding_cake_designer_online.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/bixazawag_gevida_firezatevu.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/remomati-fivafexope.pdfIn PDF document text
    • https://mipixapotorifa.weebly.com/uploads/1/3/0/9/130969355/c362e667a581b.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/xuzesenupame.pdfIn PDF document text
    • https://xinulirolome.weebly.com/uploads/1/3/4/5/134599248/878639e85d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/37837697469.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/octonauts_creature_reports_episode_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3805c68a-3e62-4d4f-b315-63cd3dc6635b/nosewuniduvomiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abf268f-1dd1-4b06-8ce8-1ea5510681f0/hermy_the_worm_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e0a441-45e6-4989-bcb4-958af5aeb5ed/pimunikibaboko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a9802-9978-41a5-bd36-a6e19de24270/8852967906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b0db83-822a-4621-8782-ae3f20a00263/gulitekekametukavem.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/27580711795.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 3112 bytes
SHA-256: 6722f2fc6481e457481ec26e567bee5ee8ff2691934f962887e0ecfb2c8f6d20
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 5260 bytes
SHA-256: 2cc0131ed4131f40773af89f0f91f9c6c2d9b646798a42fc26f6d0932a960ae5
font_02_sfnt_off00011461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11461 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off00011cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEE 10972 bytes
SHA-256: db6cc564bd3b19f19951442a71623f13123469c61c78eeabd1c18ee771c493f3
font_04_sfnt_off00014265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14265 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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