Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ceac976a781b96…

MALICIOUS

PDF

83.0 KB Created: 2021-08-26 00:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e1a2425122083c841f696d4b27b650f SHA-1: 444ccdbecc0bf6c4e5ba1463fd0d4445525fd7f9 SHA-256: e0ceac976a781b96b11bb5f5526597f15fece415551a7f58e35288796601c638
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggests a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure victims into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=rick+ross+bmf+free+mp3+download
    • https://www.passion-rnd.com/upfile/files/2021/06/12/51028104799.pdf
    • http://ros-grad.ru/fck_editor_files/files/pobedumuragubojewalitiwen.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ca08a8b4---rivokapinawivis.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/bff552556afb7c439bb59709e8b5f7e7/rozodelapulilemepajevun.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/6bd2539fe583902fd3ac2839c4fca3a2/81685137085.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16126b2e1c10bc---numazatibuzivumogumizuma.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/lclucb40ah5fag3cu4pl298v04/4541432416.pdf
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/36896425202.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b310e875aa---zafozono.pdf
    • https://atlaskvartir.ua/data/uploads/files/81875221912.pdf
    • http://kinel-hunter.ru/upfiles/file/18959049673.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ae47f26c5eb---48074940220.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160717e47f3307---64126376139.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/voxokinavigutujoxilu.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/772be0a468177a94f4029f105fcbb05f/52741385235.pdf
    • https://imagebeaute.fr/userfiles/file/39651108695.pdf
    • http://dgjst.com/upfile/file/gizefima.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/76267277a6120976137ad37b5bc49903/94876718026.pdf
    • https://girilawfirm.com/content_files/files/jaxagok.pdf
    • https://actor-conseil.com/files/file/naxuson.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/6eb1429270abbd9094a810e8165d7487/lipav.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/1de044593bea823af49a1fee0546d51c/17334281852.pdf
    • http://xn--b1akwe.xn--p1ai/userfiles/file/71496990576.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c1d475031974a362e41ea4479a1df643/74353722338.pdf
    • http://www.aamuhsv-madisonalumni.org/files/files/73705197599.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_off0000dde4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 16792 bytes
font_01_sfnt_off0000f5f6.bin
c3b6623f08f92cc1c35b8a881c08404346b2d830eec1a02757b82f15d12a7007
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 17560 bytes
font_02_sfnt_off00012432.bin
321985dbdca225080eeef49ad955f77e8d3cb8a5f07ccb72e06d2880d7c7366b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12432 11220 bytes