Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef29865ad80aba7d…

MALICIOUS

PDF

134.4 KB Created: 2021-07-16 03:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e00787eaef6aaf6b57b7343884a0e12b SHA-1: 27d5bdef591a60cd94adc28093cd4479c32d23af SHA-256: ef29865ad80aba7dc7c68d2b3b2f8ddcb2e1d34bed4edb7f50c1a69c56861f7b
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a payment redirection lure, aiming to trick users into altering payment details. Heuristics indicate it's a link farm hosted on compromised CMS uploads, and ClamAV detected it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7d042f1c84fe75bc5898bc50a2d47777/15110186440.pdf
    • http://renovator.cz/files/file/ninopofube.pdf
    • https://topaldanang.vn/uploads/image/files/93560153608.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b498e62fc4d---18320430254.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/a78ff8ce26b818c70b0cedee5a81d097/ribufagujupijen.pdf
    • http://jtipartner.com/ckfinder/userfiles/files/kibopujamivokizufaru.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0741cb8585bb3ee9129ea50b5acc11ee/42900189159.pdf
    • http://botosani.ro/img/uploads/file/vudubazawejemekubejeg.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ecb21c37---30638323079.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bc644743f---rinekepalukiraju.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd34cacbbd6---16737526091.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d8c67b098f2da7c315a213b8f1e54d41/581659237.pdf
    • http://93564497.com/userfiles/bukiw.pdf
    • http://akkoryazilim.com/userfiles/file/tasagojekamatubadi.pdf
    • https://betentour.com/sites/default/files/file/bubizugo.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/a651eb3fc9524d7908f1b741d51164e0/dafedux.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/6a400c88a546273e48cf3c31ac4ae90f/tijefalofikupufaxobalu.pdf
    • https://greenfuturevietnam.com/Upload/files/96609897807.pdf
    • http://nowyhotelik.pl/userfiles/file/15178869622.pdf
    • https://systematix.pl/userfiles/file/sugutewukuzufodaboj.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/9fa4f2c982f232b7a438f953877781ca/38044643469.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/89637731505.pdf
    • http://shqinze.net/admin/upimg/file///99202667331.pdf
    • http://orchid-daikanyama.com/userfiles/file/megazafaxukevatelimi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=itunes+for+windows+7+service+pack+1+64+bit
    • 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_off0001aae7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAE7 16792 bytes
font_01_sfnt_off0001c2fe.bin
e8af62fc9bf8486eedbfa7a5142bc2bf9a6a774df3e4b123d4aebe907db6ac17
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2FE 11352 bytes
font_02_sfnt_off0001ddd9.bin
c9be4a4542fe8ac50780a704ae58b7ea8df6410720bacd0c1199dcefdc94ece0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDD9 17392 bytes