Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d89110264dc664e…

MALICIOUS

PDF

88.1 KB Created: 2021-07-09 08:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96f07896ac6ed1578402c07065f1de40 SHA-1: 51a86e69f2457b905e2de2cbae39d54bcab67c69 SHA-256: 0d89110264dc664ec903bc1d6c22aab3ce735dca955461f270df83ef9159227c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate the document's primary purpose is to redirect users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://medvor.ru/uplcv?utm_term=ideological+party+definition
    • https://ivaco.it/file/96923576949.pdf
    • http://farmina.ru/uploads/files/72967226711.pdf
    • http://happyhanool.com/ckupload/files/72356920721.pdf
    • http://jamessham.com/admin/usercontent/file/zokowevomevilena.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/psg75tccndsflc0frim888faaq/gijisujaw.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/d0bf1c3d733984cece0ccbb99f84a970/labugewazajabasimileniwom.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/8d9f9a640d3da47d16a8f998b0cc724e/66909612151.pdf
    • https://dailyhondaotomientay.com/upload/files/nukomanabipoguda.pdf
    • http://wagnerfamilyreunion.com/clients/866685/File/lokobubogedivumi.pdf
    • http://ttccid.com/userfiles/files/5070136400.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0911bd23ae---mogigisaleruwapesoxowar.pdf
    • http://alarcon-v.com/editor_upload_image/file/kuxexiboweluniput.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a2e4e4158---91111474927.pdf
    • http://adveotec.com/img/file/zolimunesijoxedudiwuwine.pdf
    • http://stattus.com/assets/file/foviwefuz.pdf
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/91485489741.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/c6m3fu4j3riudv0ktaiufub4g6/rewupitoriniviwezodi.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079fdf18d907---56445446753.pdf
    • https://www.utn.ac.cr//sites/default/files/files/20066068304.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a04681e38b1c5716745aecf70af2a2f6/lojoruxunuvuzares.pdf
    • http://bigxra.com/uploadfile/file/2021062003485873499.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/40162510201.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/p391octo1gdm60i9m1l5phjb8m/vepewupejuw.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_off0000f315.bin
4de7fecfed3e4884a30ad017f6ddeec9c8bb7863d0cc6f4f6c003151ae776850
pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 10692 bytes
font_01_sfnt_off00010b84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 16792 bytes
font_02_sfnt_off00012396.bin
1dbe6b898443a66d498f8403dfff47416052afb06ada86c3dbcb17b0bfeb25e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 18164 bytes