Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e55f8d9da473cf8…

MALICIOUS

PDF

79.8 KB Created: 2021-07-04 03:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79af39b081b49df232d4fce9352056dd SHA-1: 5e6599e88b664a1f02cdfb21cf3686102d46ce57 SHA-256: 0e55f8d9da473cf8e11a353bb56962723afce089259a1f7c6c8b9a2b8f1b31f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://people11people.gr/uploads/File/87819709066.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4830c058---dalanalovevajosobakolimud.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/70f20b62c2a8829694f61fa731021b88/71275340112.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8636b14c4d---tusizubibabusefo.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3984dd77ea---58750720473.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5877255df274cfbfdcd6797e939718c9/pamudumajitezibitodoloxer.pdf
    • http://apexibd.com/uploads/fck_uploads/file/gejadinufanajexakupukanoz.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/lusosujujebil.pdf
    • http://dissanna.com/temp/fckeditor/file/kamuwaxasimewazapekugikex.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16099e8adab9e0---gifedifudewafokemijagud.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e99357733d---fuxopalikijorududifoxove.pdf
    • http://dienmaythanglong.org/uploads/files/68079452152.pdf
    • http://pusulacampeyzaj.com/images/media/files/90744820079.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/18766837979.pdf
    • https://33mobility.net/uploads/files/zasemivusabamufiriz.pdf
    • http://banphimchuot.com/userfiles/file/97396002786.pdf
    • http://salukool.ee/upload/userfiles/file/11277674105.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b91507cba1---6937098816.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/68032032c5fa0009b39abf4a601aef88/25945565805.pdf
    • https://celebicatering.com/upload/ckfinder/files/jefagexotewelogonulowut.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/4b1db8022991f9e594451f397a2ba9cc/53802816338.pdf
    • http://asirakademi.com/resimler/files/goxis.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/4f8b2d96fdbc44ca4d1f6b067c78c5aa/67591815190.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/876973b74397e981c556160caeb6e44a/xupafamosoniwaxid.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc8d3ce919---66361229611.pdf
    • https://decoveinvestment.com/userfiles/file/kifik.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=colons+are+used+to
    • 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_off0000d75d.bin
0357ab66b4c8d526372ea237101bd41237adefae3a0618d79133dd49c5593b00
pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 16732 bytes
font_01_sfnt_off000102bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 16792 bytes
font_02_sfnt_off00011ad3.bin
eb20656cd4b733eca3c9744b52c43fc1b909b3b455186f42e57a6d9f7fa07966
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 10280 bytes