Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0410b9d041391d…

MALICIOUS

PDF

92.9 KB Created: 2021-07-03 01:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92faae63dfd6d4c283f54a4a18e286de SHA-1: a1b6862d19e54cc9a08531d949b901e0b8d6229c SHA-256: 2f0410b9d041391d05fbd37d771adebe3e4d951ff7d6ab911b19ee55275f1b03
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used for phishing or distributing further malware. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pretext, where users are prompted to call a phone number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://hb1004.com/userData/board/file/30108792242.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cce7e3d1---21589310835.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/g4d4b90cucr9fgbqemuq6jjvp2/65866992921.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1d53feab---36117940303.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/97981649339.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084396185896---bofipedusokuki.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/jm6s7a8vlmdl3o5g5q7s5l5sik/44371863120.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad04757bce8---kipudifofivabejuwuf.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/82h6ea4iqs8hg7ofq1d3f2h523/66587508778.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078b653760b0---84866375312.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acf81660346---lekawebafuferilefugej.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4ekli6arqrgfs4dr7te2st00v0/90014542656.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf74315f66---7157992048.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/185a80dc2461ce870083fd86f270c113/lezofajuxapep.pdf
    • https://banghenails.com/upload/file/26868046941.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/kerede.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cbf1537da---24105817818.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bo2riqifjtrdu3e3eea4gmeb3g/vuketi.pdf
    • https://jambukuning.com/contents//files/4646731247.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/0qvj3scol192gg0tqstdvid7s2/saxoxavavenezurovuluduvi.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d929b7d2c78---fefetapabigopedowonopizil.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b935d4f51c---buxudapokiporulifidaweliw.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0f58d346961cc8a465abfba710e3e1ea/18724464031.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/9cab23262476670b9ce17506fa8e9cc5/30916227346.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3ur9arcqnb4l5od1ug8d81u06n/pezenukeginifisove.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+much+are+closing+costs+in+miami
    • 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_off0001063d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 16792 bytes
font_01_sfnt_off00011e4f.bin
ec85486e66ce0dca32d77299b46dd06ffb983a179842ffbe9e67a8f7a7923983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4F 17184 bytes
font_02_sfnt_off00014b6c.bin
7def8a91ed88576c44b0f8459fce2201585ada45ffe2e5e206a626c6f74b1ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6C 10856 bytes

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