Malicious PDF — malware analysis report

Static analysis result for SHA-256 919f747bf706ee9e…

MALICIOUS

PDF

96.9 KB Created: 2021-09-16 10:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7917dad6a80f6b86ccfdec7c61ce126f SHA-1: 24624af041db6b363dc709a13c2212ca3a7d43ab SHA-256: 919f747bf706ee9e31f50018e49dffdfdfbeffe1250a3f1ec7f7b7de4b0cad42
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. The document body is heavily obfuscated, but heuristics indicate it contains external URIs and link farms, suggesting it may attempt to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to deceive the user into performing an action, such as calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://allytemp.ru/uplcv?utm_term=ps4+remote+play+over+4g PDF link annotation
    • http://kronospan-mofa.hu/editor_up/mulituduvuwen.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/29812305575.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/38078147271.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/bokidupuva.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/rijawazirokixaxefatena.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/19969850319.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/53468283106.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/titisipafujerutemotalira.pdfIn PDF document text
    • https://kaparatt.com/images/File/farobufu.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/28738511799.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/38968774128.pdfIn PDF document text
    • http://ergakiland.ru/files/files/sopirozununupuvo.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/goe65176eior69pqo907mou2si/zesesewitigixumof.pdfIn PDF document text
    • https://masihpt1.com/contents/files/mogefanabawegawafezofi.pdfIn PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/gudafobose.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109062101026727.pdfIn PDF document text
    • https://agatanorek.com/files/file/wolobavuzesoj.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/jabovaduvakakalanija.pdfIn PDF document text
    • https://sanidom.pl/img/file/farinavusadux.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4160798df---78614226583.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/49217914318.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef2fc10fd3---71875665341.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/09a6aa176261b0e2b1140149864319e5/87653966215.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/xopamanawojuzokajolob.pdfIn PDF document text
    • https://primer-spb.ru/files/files/mupotujob.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 10660 bytes
SHA-256: 2282c2345da6b835318e578df75161fb61477c244237a668d76e9d30109f38a9
font_01_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 26308 bytes
SHA-256: 0ee858383131d57bce24e2054b8f856252b0043a268c50fedc9d062e1cbcbeaa
font_02_sfnt_off00013df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF0 16400 bytes
SHA-256: 6a31f506274886743e874930a6cd308d50af2f4eba8d49f4de017b26000e2199
font_03_sfnt_off0001548c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548C 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_04_sfnt_off00015c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.