Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09eb2a6ae8224a7…

MALICIOUS

PDF

79.5 KB Created: 2021-09-23 15:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 10f0f498a46050c9d6dad8b3aaffd333 SHA-1: a7c6113cbfd5e6a9109b07e882936a5a369582ae SHA-256: f09eb2a6ae8224a78064f6fab4980542a6d200db557298b57ad3ae512db9d07a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. Heuristics indicate it's a link farm on disposable hosting and potentially a phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=adobe+lightroom+apk PDF link annotation
    • https://vsevolozhsk.mebel18.com/uploads/files/ronisovukosujit.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wenerixokovomadajumu.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/xepinipi.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/pexewiz.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/puvawoxidakazulegenuwa.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/pipijefatijoterunu.pdfIn PDF document text
    • http://keramann.ru/uploads/files/suvanojida.pdfIn PDF document text
    • http://warehousetraining.ie/images/rivuretokonoz.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/79047673883.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/vpcs2onv8sbap3ocsho12klb33/8160561822.pdfIn PDF document text
    • https://media-get.com/userfiles/files/95030337557.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/bavoxafifa.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/1686986842.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/mafivaza.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/78265b854a8ed158d5b5944ababde665/16294254380.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/55357310373.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/debb82b5d7894bdd5ceb6095d7308ec8/407742433.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/tizub.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/rufidijugulaxawesagapopip.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/98891284043.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b15454dc2513252982344fbca5d0c306/9305349928.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/nitirexejatasivix.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_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 16960 bytes
SHA-256: a36f456b1ab656dd4954e4303ebca67ad3cc5c7a2b02c17820885f533bffc1a6
font_01_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001189b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 10780 bytes
SHA-256: 8b74eee3f7486806dbfe717139a8a0a6f68c09b0f75e8100dae87141490af8db