Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab683edc6b25757f…

MALICIOUS

PDF

76.2 KB Created: 2021-06-08 20:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fac980619ff13491ff006f3419d08384 SHA-1: cdfd1cbe27d9973066cae6b9e85ddbef2ac4c9e7 SHA-256: ab683edc6b25757f74d7d630db267199d8e0444cb1c12ce62d39721dc62f1cf6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to direct users to other sites. The document body, though heavily obfuscated, contains references to a game, suggesting a lure to entice users to click on these malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pistant.ru/pbw?utm_term=pokemon+crystal+clear+gba
    • https://tujemodi.weebly.com/uploads/1/3/5/3/135301643/5400507.pdf
    • https://cdn-cms.f-static.net/uploads/4443804/normal_606a7934469ce.pdf
    • https://cdn-cms.f-static.net/uploads/4411501/normal_605654f056540.pdf
    • https://cdn-cms.f-static.net/uploads/4446646/normal_606725f073a37.pdf
    • https://rigafimer.weebly.com/uploads/1/3/4/9/134901715/munulopuwosivav_daligunesi_fopunuji.pdf
    • https://bowogemiris.weebly.com/uploads/1/3/4/3/134316512/1328707.pdf
    • https://cdn-cms.f-static.net/uploads/4479240/normal_60214764cf013.pdf
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/8352192.pdf
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/2397737.pdf
    • https://cdn-cms.f-static.net/uploads/4484169/normal_60268b367e33a.pdf
    • https://cdn-cms.f-static.net/uploads/4451229/normal_601723adf2b42.pdf
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fdd09658c586.pdf
    • https://cdn-cms.f-static.net/uploads/4463785/normal_600c7f2897792.pdf
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/144a4d1ee.pdf
    • https://wubeponasi.weebly.com/uploads/1/3/1/6/131606197/332297.pdf
    • https://cdn-cms.f-static.net/uploads/4483337/normal_6039c6b90628b.pdf
    • https://tadebuwa.weebly.com/uploads/1/3/4/3/134366374/zexezafaveleja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1de143ca-e9b5-4048-be96-bac44028df9e/9207445349.pdf
    • http://rixepal.pbworks.com/w/file/fetch/144813462/meteorology_today_12th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/9f7dee7a-ffc2-4ae4-89f7-05e96aca3edf/juvojisu.pdf
    • http://redelaw.pbworks.com/w/file/fetch/144537432/how_to_play_baritone_saxophone.pdf
    • https://uploads.strikinglycdn.com/files/8f014f6e-8baf-4873-bdf2-2bcbe0142283/13398147118.pdf
    • https://uploads.strikinglycdn.com/files/46307896-02eb-49c7-a0b8-f215993cbb1e/what_are_the_hardware_components_of_multimedia_system.pdf
    • http://jifesepapo.pbworks.com/f/92901002268.pdf
    • https://uploads.strikinglycdn.com/files/fa75e057-12c7-4ded-b62c-62dde3d77dcf/ccna_book.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_off0000dff2.bin
3c8cfa42ffe7cd79fda6da786eacd3f08e099ff43a624eb214d9789bd0d4e294		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5164 bytes
font_01_sfnt_off0000f171.bin
7d93da9eda6bdffc00618d4059f8a848a55810116b79e2274aa709e80f2e5586		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 10476 bytes
font_02_sfnt_off0001152b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152B 4324 bytes

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