Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ae07d43ede79ec…

MALICIOUS

PDF

126.9 KB Created: 2021-06-26 07:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8fe7e6ba16d9b399e33b019e624b7ff SHA-1: ad44425a05bf05f1a34ffa656e358d4093cbbd96 SHA-256: 93ae07d43ede79ec284c72c1ea88c8e0485fde9933cd9ca5014ab1dce9cd5958
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to compromised websites, suggesting it's part of a phishing campaign or used to distribute further malware. The presence of external URIs and link farms on disposable hosting indicates a deliberate effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://chcial.ru/uplcv?utm_term=permanent+dipole+dipole+forces
    • http://malagi.pl/user-files/fck/file/vukitedopuburux.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/66884b3c5334c0702368c3ea2ee156a3/72617316554.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d20a34d31---50874189470.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7379b0a18b---19470690737.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d7c319ec3e44695daa3e3d0b9504765b/xowimelepadinuno.pdf
    • http://amandatravel.com/userfiles/file/59219101259.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd90c6a86a---55928180515.pdf
    • https://fultoys.com/userfiles/69106050741.pdf
    • http://rustproofingottawa.com/userfiles/file/83938277009.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/smguinbcs3ba4tfhcg88dm1bs7/zakiliwadoseruxak.pdf
    • https://atlastoursntravels.com/userfiles/file/93591608393.pdf
    • https://mosconi.net/userfiles/file/44744556630.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a58e0521aa210b72703a4421f98c9c79/difozunigate.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/61559804907.pdf
    • http://sevimticaret.net/userfiles/file/sarivakidimawif.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9721a6816---92176309820.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/alki8dssne35gmj0r7ugh21kfe/71346259078.pdf
    • http://ackerviewguesthouse.com/userfiles/file/fedufab.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607184cf6dc5d---rofezunulexad.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc6a0ca38---noxupuwalimatuvik.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/br9h51qe8nehtcdcljhhcl1jsu/viwomiwufu.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/cc6c8d83179f8a019fd8ee072202dc73/zilodaki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001892a.bin
ff561146dfed5d2e21cff0b7031f4222657055350665ba2382737c741bbdd3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x1892A 10780 bytes
font_01_sfnt_off0001a1f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1F2 16792 bytes
font_02_sfnt_off0001ba04.bin
da2c449032c66ca0bcc15441b1b3d09bf906482c16ccb83251f58b6b0a432aca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA04 19072 bytes