Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed5a5f880582fcb…

MALICIOUS

PDF

116.0 KB Created: 2021-06-30 17:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b09616caa7b653123b428d8e1519a823 SHA-1: 2bedcbd094e7221bf11f475456a6abc4088d36b2 SHA-256: 0ed5a5f880582fcba020412ebbbdeadc2b3947f30b88ae91429505303272d526
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains multiple external links, some pointing to compromised WordPress sites, and exhibits characteristics of a callback phishing lure by prompting the user to call a phone number in a context of billing or security issues. While no scripts were explicitly extracted, the presence of external links and the phishing lure suggest an attempt to trick the user into further interaction, likely leading to credential theft or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

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://medvor.ru/uplcv?utm_term=employee+performance+appraisal+questions+and+answers PDF link annotation
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/1a022507c58338ce10d6fa115c855541/podixodumaku.pdfIn PDF document text
    • https://advik.net/userfiles/file/96549592174.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/bexuwuvolavag.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/91511276691.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1be234104---bopoloxuzoresigigid.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wugezululob.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vrse1j0tnnrq73v9pct72a3fmq/970763215.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89cce5500---59316613272.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/f745416f8100ae31b33f74ccc119812f/29703540208.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/lajabo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a331e28bcec---lakafa.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/47131371747.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f554a06d874b34cdf30301eceb2b094f/dizaxugoxu.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/gupesibi.pdfIn PDF document text
    • http://recrute.fr/files/files/nubut.pdfIn PDF document text
    • https://afayl.com/userfiles/file/ranololonatus.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3afbdca437---48809295449.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7fe86702d---55892404145.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c7e8487aa---vunufonadijokofipomitoj.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0eb8e83fc---jarozubaw.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/d3m9m84u03h9cfeppe6q6vl15o/18509668778.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de39d5ca43---25968223022.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8eaaaaa01705953cd8ab6e597c289aa8/4221060456.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/xeniputuxunoxoxibejuloni.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c27c2314133---negerusopem.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072adbc86874---97420753639.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_off00016050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16050 17768 bytes
SHA-256: d1efe4a43f4529070bda6d71aafcbbd07cb57a8f812d0886868437b2351579ab
font_01_sfnt_off00018e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E3C 11208 bytes
SHA-256: 2ca562ff6106a31b34a71225a9fd923229325cd2f1f245ca505d27f10483c5ec
font_02_sfnt_off0001a856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A856 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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