Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc96c333d4c1fe5…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 13:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d367738f1bdbaea202c8717def04486 SHA-1: 97f75f860424d006f319e64519f76782d9db0df0 SHA-256: abc96c333d4c1fe51273d3b6738360fd36b8e4a2adb030d7292445f9dd18c456
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs and the document's structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/00eebe27510a9743950442c0de4c77eb/26148737108.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e8a4dbc9---66924943179.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/07447d48b42249e0bd7ec07dea8439c9/34542946081.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/4975a76e5015bebbb092eb4f88c4ea9f/kitikikuzopuf.pdf
    • https://patc.fr/imagesfile/kenujuvixubobizu.pdf
    • http://naplesredeals.com/userfiles/files/13460181821.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/6e6c237fd21e609dc4a61674eba46cdb/14438795349.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16082411d28ded---26606392050.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959f34cbfcf---71625298270.pdf
    • https://guapa2.com/admin/fck/file/78986674658.pdf
    • http://megaprestige.ru/uploads/files/waxotutegifijawaw.pdf
    • http://ash-graphy.com/userfiles/file/regazabageboliwe.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/fatepemavosubu.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ab2eba9be---sexebelifopekerijexexuxur.pdf
    • https://alatheir.com/atheirwsfiles/file/gezugiruvanewoko.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d66ac62a35---42536620028.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b3feb6896---wabosuketi.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4553a98cf04b4cc2282672c2f9aa40f6/gujifesixavapepevudub.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/q38fqsi9i30t9sl11faincoe22/99971028522.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0885fcee56---nafabufog.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab84acacb5c---dazaninudonawakujofewef.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=graph+for+charles+law
    • 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_off0000eba5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 16792 bytes
font_01_sfnt_off000103b7.bin
2ad89c5c546eb7c7fcb6558189060384dae77d56ad4646ce0e3e62754fdc1836
pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 17448 bytes
font_02_sfnt_off000131be.bin
7631f65ebb79cad46aa8c4991f7268d0d90bf575a1fa571df3591356fb0b367c
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BE 10408 bytes