Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b055b931b1c616…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 06:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93020ff2d53e9d781312d5786634b625 SHA-1: 117effa0447dd7b6c1c7bc74baf565a1267e5933 SHA-256: 09b055b931b1c616bdc3261c46f8388e79cf29b808e79743bd9f6a224000d99d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users to these external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=compare+sonnet+29+and+30 PDF link annotation
    • https://getadoc.in/ckfinder/userfiles/files/luzedezar.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ktblnptna86h9mh1s375ajaekl/rurenoxezarofu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0630db577d58d7f58efadced330a8222/76928101574.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/vipekakilukufewa.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/93013014962.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b605cd51661---vitelitatomog.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/59796118445.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/63147937177.pdfIn PDF document text
    • http://sgpeo.pl/users//file/94072207871.pdfIn PDF document text
    • https://podimercrm.com/img/files/lozemafod.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/499839a652e6beac62a7278292a37b00/54891497165.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/bedodoxovevaw.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/nojaxeworosi.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/rcptjh35iojl85frdiuosdrmd3/57024725986.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/durokojifaxunu.pdfIn PDF document text
    • http://baove24h.org/upload/files/7817372847.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b75c5bbf950---6698196095.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/89788141035.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/db8c7e428487d9b5a7ce3f75c636f971/24885065075.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/dozitamudi.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/49810779100.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/64188520963.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ee0159fc7---13742988471.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/saxazogakoparejuvakifidep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 11028 bytes
SHA-256: 44f1f3df313c69d4bc6fe798bcc1a716584f81c2b202a8eb6d593be8de46ae39
font_01_sfnt_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 18296 bytes
SHA-256: ce0e03a19876d014a547e73cb51c8648668f75ec3ae60f453b3777da24943ece
font_02_sfnt_off00013518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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