Malicious PDF — malware analysis report

Static analysis result for SHA-256 70356336e3ec3b1a…

MALICIOUS

PDF

83.2 KB Created: 2021-06-12 05:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c182ae2e5c1169d48fdfd59c36574422 SHA-1: 6a2b7a8e4d2b77e246a22d29f055f0d964b58228 SHA-256: 70356336e3ec3b1a1a3bb85009aa20110370e82a06ae6dba542d0a48787f9bcf
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. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'Gran turismo 2000 ps2 iso download', which is likely a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://pixomot.ru/pbw?utm_term=gran+turismo+2000+ps2+iso+download
    • https://fivomatimib.weebly.com/uploads/1/3/1/0/131070631/relim.pdf
    • https://vinadesafabav.weebly.com/uploads/1/3/5/3/135305522/4618012.pdf
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/kobegekoladonufibak.pdf
    • https://soramaliduf.weebly.com/uploads/1/3/4/7/134716182/fepolomibenipob.pdf
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/1359853.pdf
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/wikufufotu.pdf
    • https://kodetowunim.weebly.com/uploads/1/3/4/7/134701578/3355234.pdf
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/gupawusal.pdf
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/2e59d7.pdf
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/nuxulobusegutu.pdf
    • https://lupasunalijifaw.weebly.com/uploads/1/3/4/3/134385939/38756aa98dfb2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jitilabajeko.pbworks.com/w/file/fetch/144724677/27280214510.pdf
    • http://wixudes.pbworks.com/w/file/fetch/145150935/i_have_a_slipped_disc_in_my_back.pdf
    • http://kelivesas.pbworks.com/f/basefekedifopepux.pdf
    • https://uploads.strikinglycdn.com/files/1fdcae30-9ff2-438c-b606-56545965aa70/11889086156.pdf
    • https://uploads.strikinglycdn.com/files/90a466ae-8446-41a5-b359-3780f75cd08e/xigodekegirufizop.pdf
    • http://podixarutib.pbworks.com/w/file/fetch/144473649/what_can_i_do_about_unfair_treatment_at_work.pdf
    • http://tovovojufa.pbworks.com/w/file/fetch/144669348/tefigugatagifojuz.pdf
    • http://misabovu.pbworks.com/f/sataxabuli.pdf
    • https://uploads.strikinglycdn.com/files/ef354939-3e34-48c0-9552-0b6f639cdc26/what_does_it_mean_to_not_burn_the_midnight_oil.pdf
    • http://kefimazusob.pbworks.com/w/file/fetch/145120098/vuzafuwolamegemajedup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f783.bin
74b5004d42bc5d7087ecbf4a338f0fd90369d4e9c66f7b2e2ebf8c5051b1657e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 5268 bytes
font_01_sfnt_off00010957.bin
77c098793e44dc0fc93e9bf591637d72f53db819da76a875f1c9b972d7c78d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10957 12144 bytes
font_02_sfnt_off00013160.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13160 4324 bytes

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