Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e18942810107215…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 08:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be97b7189583d55eb3c5467929f4d8bc SHA-1: f8b0258d4644908f6a9d54ffe646c32aa007ef18 SHA-256: 2e18942810107215ce686b182c7425a32e50e8e53555b322bd28716a462f8c93
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of a 'callback lure' heuristic suggests the document may be designed to trick users into calling a fraudulent support number or engaging in a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://chcial.ru/uplcv?utm_term=hs+code+for+iphone PDF link annotation
    • http://anaminfo.com/attachfile/file/22529550167.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb188d667d---ruperow.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/192210178008.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/9iq15idrd8qkhqv8b1ac2nsk59/wemogatezoz.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/genigiroregokuvili.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c32da22e54701eaa7b793ff446d207c8/274025678.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/zubabasodenefagubokake.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/81qf09fq7aivqoh2d4hh4tje84/1207269528.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f827c06ff4---55240158126.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/girixunukusivewulavafis.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d4120c41bfac3af2f4dd62983225b9a0/27173219259.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/u20s7edaldaitlcv5hku4mcfh5/vavategawikegugiz.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vr3lm4tq9m3mqr6g5m8ib3utmo/25424114348.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/qmaju5hibi27tsi3hiep21fnq7/10704311271.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c31b4728e08---logaxa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34c6169c52---riwax.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6b554bb8e2d0d67e7a14fcda9d5b55f3/64090807453.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/04k3cntavjupedhbd7mu4sanh5/mevudisigobisegufonaleb.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/i67vl4gjaftn77sm4r8e71kohq/14645982422.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/dabapetibefolelubozopije.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/vipojeru.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/tomukiwaboredejipepoke.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/a2omqopscebes8113u76nklru7/pumijisebu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/9p8bus1vpts6qj0s4jdg2bouv1/kamipanalozege.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/wilino.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 17768 bytes
SHA-256: cd0d9d8cb751adbc72116ae7d6420e6b890f1b545e6679ce80660e609c27744d
font_01_sfnt_off00011fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13804 10404 bytes
SHA-256: 6d7eacb195b4d8601eb1f2d3b3622e65c63beceeaf1b21dcf3586a9b3f4afb68

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