Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abf8863548c85a2…

MALICIOUS

PDF

83.4 KB Created: 2021-04-04 23:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f01c1ef68c8b6c682164fb02ba0cc9ef SHA-1: d18df2d659b0c90550ceb865f13d721195dc8873 SHA-256: 7abf8863548c85a25e95359b00fa18938cc6a46356ae87ee4deb83daa8d4567b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a domain associated with keyword-based link generation, suggesting a tactic to manipulate search engine results or distribute content. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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
  • 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://vilenefex.ru/wix?keyword=hoover+max+extract+all+terrain
    • https://cdn.sqhk.co/matejedu/dGgh8d3/ambani_parambara_audio_song.pdf
    • https://cdn-cms.f-static.net/uploads/4456685/normal_602c51eccf845.pdf
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/80ad2.pdf
    • http://xemizawufogutuf.scienceontheweb.net/42050913395.pdf
    • https://cdn.sqhk.co/pirasemofoge/ihCGNTW/top_10_street_racing_movies.pdf
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/likopoxo-zurezopoz-piweragujejuk.pdf
    • https://kawowubizi.weebly.com/uploads/1/3/4/8/134864460/6355531.pdf
    • http://creamwalls.online/arduino_sensor_shield_v5._0_manualpof8c.pdf
    • https://wutusubefesuw.weebly.com/uploads/1/3/5/9/135961291/rudabederemu-renefosapanifo.pdf
    • http://trynutra.shop/virubuzikekigec3zzq.pdf
    • https://cdn.sqhk.co/fowifabibu/d2mzabj/47648991063.pdf
    • https://static.s123-cdn-static.com/uploads/4422137/normal_60035f553cd86.pdf
    • https://cdn-cms.f-static.net/uploads/4460263/normal_605f444160d09.pdf
    • http://justiciaforjustice.com/vibogudisonugusazufy3hz9.pdf
    • https://cdn-cms.f-static.net/uploads/4383791/normal_60192e5d38cfc.pdf
    • https://cdn-cms.f-static.net/uploads/4383574/normal_5fdc281cd5591.pdf
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/gonifenir-nopejedobironi-zodavabup-gatikamoxaxis.pdf
    • https://cdn.sqhk.co/jagugide/hhhziij/bed_sheets_hanoi.pdf
    • https://zazukorowoko.weebly.com/uploads/1/3/4/4/134488568/5783104.pdf
    • https://metojonokodoto.weebly.com/uploads/1/3/4/8/134881876/baxoxelamolu_jefovoja.pdf
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/rudufurefur.pdf
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/7b6024855.pdf
    • https://cdn.sqhk.co/resekobe/Cicl2Qs/dj_logo_design_psd_template.pdf
    • https://mejonozawus.weebly.com/uploads/1/3/4/0/134016798/419eb153be9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gamelaluwer.myartsonline.com/60307459752.pdf
    • http://xekabotiwuker.atwebpages.com/sample_company_introduction_letter_to_clients.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010896.bin
4a1e99f153f3e7d3a1cc09a7d8667b53d95c49dce2c8eef6bec47cdbe090bc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 4856 bytes
font_01_sfnt_off00011902.bin
d76d6a54ec1fbb0faf95d04596d1089c2793a752c8ff370ec9eb75c998115f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11902 11584 bytes

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