Malicious PDF — malware analysis report

Static analysis result for SHA-256 890198e121cb5506…

MALICIOUS

PDF

118.8 KB Created: 2021-07-06 17:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 82bb2ba4eced259e51507fd3aad867c1 SHA-1: c2a48eef282c0781a963e1e9f543e0404e45498f SHA-256: 890198e121cb5506ec5ecb078ef096da4f4c5f8ae23681088c3d455d64551d12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://garglob.ru/uplcv?utm_term=wizards+of+waverly+place+season+1+episode+8 PDF link annotation
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/60c3aa1a66f5afd52b11ef231b50edf7/nabebexosojurobawerip.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d006d2eda2f---31678782632.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/3a05af2dc93e6375c313e387e4bb8544/vovero.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/1b7f4a38fcff672ad4525005a448e655/70900385246.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160779fe10325e---zofatupefikevevinituli.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/delatunalogemofufifef.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/balesavogijotamolitu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3b531501---jodewasizigogupofi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6a523ab18215c89292b60a2790f14e40/lobazigivapafudakexipe.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/kujarozupobog.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/84ce1cdc40756456ebd4d33aa74d3407/tugufazunisuxasexikofejet.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f3c4fa54---suforema.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091e2d356cbf---23787926362.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2adae8dc---bezarosuzizonarifen.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/mdk3ats5pdrr2cneisf00nfang/xovubonavapetasugoja.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/68287481078.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/gstnbqf5fkvfd17bu9lid4bmqb/17709852823.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18699717a---xowajemutad.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3e078bc0---71342547366.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/84514554706.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/pifoneketabebetanenipelix.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d91cc16f6d4---61674028944.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000157be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BE 11092 bytes
SHA-256: 31bb0c5eb35efd8a26119ba3814e93447342187d1ad1486ce5c3972292b26f90
font_01_sfnt_off000171d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D9 17640 bytes
SHA-256: ee08ae6938b6a6189cd1c2717690fbedeb251d80208e760a8a0a260b9d80ceac
font_02_sfnt_off00019fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FD5 6200 bytes
SHA-256: b1366344783ea6a84648496758b7d284e0728345e08a758a425497e0a0537494
font_03_sfnt_off0001b52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B52C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1