Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7188383bd4918c…

MALICIOUS

PDF

92.9 KB Created: 2021-07-14 03:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41c19392f879350428d04227725c2cf7 SHA-1: e6a0a73f67d3bc2f5ca607ba09934f8237491f43 SHA-256: 9d7188383bd4918c21004fe1eb74d88a609c1f5480d67fb4c4929b079c891005
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing pretext, likely aiming to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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=sidney+kimmel+related+to+jimmy+kimmel
    • https://europawindow.com/app/webroot/img/main_content/files/kexodamiki.pdf
    • http://alfavit.tv/userfiles/file/54987610412.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd62628165---79000077832.pdf
    • http://nextgt.eu/uploads/file/32452313962.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/8ta08kll3n9amps87gekcm9k39/72575144401.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/38281320357.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/576249a863f5a20ba497e0f1e081f99a/zirekiluwaj.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/33f8e48e349eaff8b801b72ae5dd7144/bugufemutetivokilexelosel.pdf
    • http://www.firengo.com/userfiles/files/vuwuvaveferijaduwufuz.pdf
    • https://istanajp2.com/contents//files/50882125151.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/2q0l4io7achbfmnmhrvcisici2/kigokapefogejadulopewuku.pdf
    • https://rainbowfurnitures.com/files/files/3250061914.pdf
    • http://splogservice.ru/content/files/ginejuxekomude.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df9beca6b6---39617436960.pdf
    • http://rowanfamilyreunion.com/clients/28915/File/64960374208.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2ae47485f8---4233143337.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6m6akdvt35gddtn3g1es138hu5/36367124763.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/uijbacn83e2cqqpe5eup4vvhp4/tarenafepefibet.pdf
    • http://niszczeniewaw.pl/userfiles/file/71469695960.pdf
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/dobajiga.pdf
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/49762562989.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/a021a137337d7576c3ef27b2bd97b668/rewogivefaxoxejez.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9e.bin
6b54a3f50d1a413a5c8c0ed289a9c866e37e8bd73df0b162fe7132700ce54c18
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 16100 bytes
font_01_sfnt_off000104e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 16792 bytes
font_02_sfnt_off00011cf2.bin
4c1792dfad699a0e5c284aa171c007db1ac0e864b589698b7733240130a18f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF2 17708 bytes
font_03_sfnt_off00014bdb.bin
04c1226fbe0877d70342be869d48875ec2cdf6f2aa23c5a3030f45eaa5ecb595
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDB 10652 bytes