Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0d87b71afac13c…

MALICIOUS

PDF

71.7 KB Created: 2021-09-05 09:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bd368d0dc3d4693ab7acfa15869006f1 SHA-1: 8cb62229891988571f7fff291155565aef644d27 SHA-256: 1a0d87b71afac13c3b0095c1ae67e381d8dbdfdea2921ad5b9da2233407c7b52
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a number in a deceptive context. ClamAV detection and ML classification confirm maliciousness, pointing towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://irlanc.ru/uplcv?utm_term=botanical+pesticides+pdf PDF link annotation
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a733d76b470---15650470260.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3184cb7093---7755178968.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/tosozetanuvaxugagoxa.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610093df333a7---sedogiparajuf.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/xenodobalinajajezejaruju.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/349927ab75ea6f10fc375748de1501d9/98152846832.pdfIn PDF document text
    • http://wphs69.com/clients/1/13/13dd0a1135c99f886ff4006aa3c820ba/File/50165593099.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2df01be6b---20249767262.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/xikeson.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/zuponuwadipulupovitovez.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c233e2ac52a---minenofimofiwuxaguvu.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050301250589.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/karelulogat.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611fce7c4a59b---talapazoxiraxesir.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5fa4372b5b9e4f140dd2043380cb4e6f/47478048664.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/27495283531.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161336b6b22d8f---zevozadawuvudeta.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf5d299987---lofutaxadufoz.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/risulom.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112e9f3c5718---78213535333.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086a04311bdc---81706188853.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/gozixol.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/75123450048.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/mikirezitezuzije.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/vosubo.pdfIn PDF document text
    • https://netlandschool.cl/files/wowivilekipageboko.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_off0000ba13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 10564 bytes
SHA-256: 3878b7373d69dcd11a07bb2ca1af538086c3fefe0a752e608d0bbd47d71478aa
font_02_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 15500 bytes
SHA-256: bc994984d6f90f82dca0b52c6da2c7447007db15235a59e247da011ed50b1c78

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