Malicious PDF — malware analysis report

Static analysis result for SHA-256 87351303ab0de150…

MALICIOUS

PDF

84.1 KB Created: 2021-06-28 06:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89e1fa4450a3a552894d52c65d5b2ef1 SHA-1: 7f9b3e9f3e3c879058dcd8e46c89c172b2ca43d0 SHA-256: 87351303ab0de15061e56f91ccf0ebd594c720c4d5c74965f0c4f3726ec9b3f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to compromised WordPress upload directories, suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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://crewmak.ru/uplcv?utm_term=which+country+code+973
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f25b20df98---14758298759.pdf
    • http://arebiatours.com/uploads/files/nuwexapimopozezubefixowi.pdf
    • http://bjbtrh.com/files/pic/file/gimexesewafevudobilove.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607749fc17fc2---xolasagatamipejomorizibej.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/9ech1ql5hpseu784b6alo575e7/papuxagufotuzuvuwajesejin.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076abd418b3c---nukidaponozufagojuvop.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8ef8cd86dbc5b7387c46a2dd724d88d5/59075962184.pdf
    • http://trendybiz.in/usersfiles/file/vuzosirudavuzi.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/chhntluju30n6nrg5ph5nvbgm4/zujasoratipukika.pdf
    • https://its-bulgaria.bg/files/file/marifamabazer.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/de9f22ac64d82aabebed587827979ea6/82061489166.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacd369d915---34997531696.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/fd34a061c81fd576199df0f02e126430/38926514385.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c61744f334e---gukuzaweb.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7fc871cfd55f9e5de7a9b390d3f5f6d9/51293923824.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c320803f45---fafolikobebiguvelazodavax.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/idt7uk521qjp2rgs9ksr93g1j7/jinolilezapejogis.pdf
    • http://gidaero.com/upload/fckeditor/file/41147748393.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/dulipapafevarewemakaperaw.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/97bfd89d3b0e68d4edcb305a7ecbe383/tefawuzutogeto.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2fbd58a8---81683591570.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/snmonlhc4cghulqmmnm4tl12l0/15095618001.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6osjisorfbduvkg2hilupssbh5/soxewoz.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 16792 bytes
font_01_sfnt_off0000fbf2.bin
030302e7759c37962922cce6cc2139bdcff52ee5980c5fff333cd718b8c97f16
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 17484 bytes
font_02_sfnt_off00012957.bin
1acac20dda8ee0d7172eb74da80cfe2b1e425fc979d2263d7dee520c80f4ea1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12957 10688 bytes