Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1edc9e8a2a2410…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 10:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94bd31c82dedb771b3ef9cc52af20e51 SHA-1: 3483c97f497811b7e3bce186933c9dd8b14043d4 SHA-256: 4d1edc9e8a2a2410df0a4cb1a715000116d831720250e520aafb5a6a7c926ea1
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2bcfd837b---42066978479.pdf In PDF document text
    • https://nstyapi.com/resimler/files/29362197521.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/tasigujopasaxizif.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6f5750b6b7faea6e2bebd04519c13fd7/91389727919.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858bac1fd2b---kebesevopa.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/ec40b0208d57a455b586ab34ad40d591/fetejamubulavuborudasexu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608472831313a---mububumapi.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/pagamuvonidojuxofanapumut.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ddb82322---zesufibajofenonadema.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/094727c341f2df2d745429acc5974fb8/5344813421.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/30930515068.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae94499b9---60163201704.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160881fec57393---tamelibigugowizexamunuza.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/19589915097.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/39lj7hb0k2mf38cq3lojftdrrb/84352774169.pdfIn PDF document text
    • http://szhlfz.net/upload/vofamex.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///29065515993.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/dabivifulu.pdfIn PDF document text
    • https://campermagazine.tv/public/file/raber.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798d7ee1d5e---57069896646.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0caa5f2877265c838fba0f70ac9d8815/faxutafotoxalukowatolib.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0ae99442eb458cf37bf4bfedc748a260/55285903936.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/3698322340.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/dovivaririr.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/kupigij.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210722/file/1626906273.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/wakezogafirujafatigazasiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=catalog+template+pdf+free+downloadPDF link annotation
    • 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_off0000dd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 17592 bytes
SHA-256: 315da91c7f6963cf31b7e3791cc6997a9af78df14b571e772f4f65485153616f
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 10700 bytes
SHA-256: 90fab2749792ebbdbb78b915484a7417c8f7c35dec4447005d060f3224feb5bd

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