Malicious PDF — malware analysis report

Static analysis result for SHA-256 e922be00272df1e7…

MALICIOUS

PDF

73.6 KB Created: 2021-05-25 16:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12c604d938364ba905ccfd7883f6d062 SHA-1: 96aa3e015e789f5ba42ee8381c54cfa75c89a7ca SHA-256: e922be00272df1e7b5df11e2037bb4c9881b6fc14118aefb936ce987a2c5f8d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The document body, though heavily obfuscated, appears to be a lure related to 'fuel surcharge in trucking'. The presence of multiple compromised CMS upload links and a link farm on disposable hosting strongly suggests a phishing or malware distribution campaign. ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=what+is+fuel+surcharge+in+trucking
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/968u280usqbkks6l5p4e2sgn16/69474642925.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/52c4065c584e087461a3042531bab834/gemejis.pdf
    • http://www.lugashotel.com/data/editorfile/93385575297.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429477f664---92592269905.pdf
    • https://mariellatriolo.it/public/file/vogeno.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d8f68549b---57754124451.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc21a1ad6---89041220015.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2775a7b6---movunejetofuwenupame.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0c8598df5368e7c9325dc5c6dd058144/zamek.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/amv0o3bnralv4rv3vkg6vd2148/nefafalakuwudam.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/575119fdf3081633dced85d84b528076/tuvijejivijafe.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da6e8b1665---juxumilitazepulogalago.pdf
    • http://aaaexpressac.com/userfiles/file/63170204492.pdf
    • https://perfecthospital.org/FCKeditor/file/68383159378.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/ee9971409900c61aeb56413f00d597e6/28100443812.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083337804ed0---44355797597.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d4.bin
282ee5ccade79dd9e54b09e1d0cd795b5d8794b7b4544bf4259c37931378c241
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 4992 bytes
font_01_sfnt_off0000e4c9.bin
bc699752b9e20b01c61810c7fd779120986eb5383a55e488cd4d187d68079ed6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C9 10688 bytes
font_02_sfnt_off00010968.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 4324 bytes