Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0897fd3df107430…

MALICIOUS

PDF

88.7 KB Created: 2021-09-03 10:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2fa81cec740ad3eee032ee290d0c7300 SHA-1: 5936405711d7d31855d1c76676d72418d188f34a SHA-256: e0897fd3df1074302319163a9e043b81a2a514119074721f82974d79fff36f7b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of phishing and callback lures. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The heuristic 'SE_CALLBACK_LURE' specifically indicates the document's intent to trick users into calling a phone number, a common tactic in tech-support scams and financial fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smidgel.ru/uplcv?utm_term=the+allergy+and+asthma+cure+pdf PDF link annotation
    • https://projetovm.com/uploads/files/godubisipudasejavel.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/693be700c065ee5af00d582b50c918b2/lamudenela.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/40a56fb4f8d1a1f891766377a313ab5d/furimuvorufipisa.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/waluzebixikopalawiwe.pdfIn PDF document text
    • http://sibservis.com/ckfinder/userfiles/files/raketefiwinogovemudevogag.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/2841865042.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbbf84d87b6---rimeje.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/purakifazunegife.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/negopipajusu.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/54495553290.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/jofuzolozuva.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608a72f481a53---84546940066.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/zaxijomulozujetu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853ed90d4eb---suxonumamawemolewi.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/69324251145.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/vorabudixobisuk.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/wabarasajusekotiweluna.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/regalerubonum.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-17/20210617172940914486.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f02583a9ae---54047282981.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/17397374958.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a2b9eb998c2428c3580d90e365f933ee/95077221659.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/711a07e565d82ec5cb4a95892e2491f4/vukewuvuverub.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_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 11032 bytes
SHA-256: 8a3c3af9fe10fbc86e12441c9d388ffebf92a3477ee0eb5704b7fccdd9966bc8
font_01_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001287e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287E 17384 bytes
SHA-256: 06fd5ccb47c5da2ef455cca4f7863af04b61a854e625221666b54ce28a3df3d5

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