Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22b3bba4db897bc…

MALICIOUS

PDF

84.5 KB Created: 2021-06-27 01:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf3286bbddd1bd78ea51240867fa7e96 SHA-1: 39eb875c5295d1f55126de64152aadbb3f667304 SHA-256: b22b3bba4db897bca49b1deb9150735696c14e0ad19ee782f22c11d7577819a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=the+parable+of+the+fig+tree+meaning
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/r6iakb97r0ofl09cbe9l5dmpr8/89428973020.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f2adab562069a84a44a8986b52517cca/zunefoladixud.pdf
    • http://diversecityuk.com/userfiles/file/rosuvawowemorilujo.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6c790c1fc094efc43ac8a34df5cbfb34/luzesilubavanekogiladinu.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vs5lftfi9mrk7n61ecuopesq87/24781825905.pdf
    • https://al-farh-iq.com/upload/userfiles/file/25847948992.pdf
    • http://dawahcity.com/userfiles/file/jalarebemulenobowaw.pdf
    • https://advantagelic.com/singhania/downloads/file/62134323344.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d30f60398a---tomaxerobaloni.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41651819802.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d109b9c1---38666042124.pdf
    • http://mobilni-kadernictvi.cz/files/file/41854834129.pdf
    • http://namngonviet.vn/user-/files/posilerafixagugar.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16086550f4f9c4---30749258323.pdf
    • http://airelimpio.mx/img/editor/file/67770350152.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/idckh482tttivfis93vslsl2i0/36058263239.pdf
    • https://gea99.com/ckfinder/userfiles/files/89127474223.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92a97d5e9---taruw.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070e29add2bc---zifunukarewirukuzirotu.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadf2ed30b---fifagejutojiribes.pdf
    • https://hanedantoptan.com/upload/files/78501399152.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b222d40ef7e---70202260279.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3gt855vsjt1fbq5jvj7ri89srm/77018222821.pdf
    • http://theheavent.com/userfiles/files/doxitigabikanixuzojis.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_off0000e8f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 16792 bytes
font_01_sfnt_off00010110.bin
8b90ac85068c83013af4fe1628ab3261482ea1f93196ebe80c75a742feda7c6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 10740 bytes
font_02_sfnt_off0001194b.bin
8f1a6af59ebf8fc8b63fffcf7d0573f7f3ea7952b45a408ca7954c395bd4245f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 16844 bytes