Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bacc0fe76aa9442…

MALICIOUS

PDF

80.6 KB Created: 2021-08-01 06:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54b5a79f7fb773b662ea001d27556266 SHA-1: 56341c96dbdce3c86e8231a848df248720cdb081 SHA-256: 3bacc0fe76aa9442f53af6794c605c4f01194eb944af2f4ea6a899bba39569cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, directing users to potentially malicious or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=coment%C3%A1rio+hist%C3%B3rico-cultural+da+b%C3%ADblia+novo+testamento+craig+keener+download
    • http://mynigaoe.com/upload/file/20210731131442.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/8baf7012ae32dbf75782de2a0107c89d/defoxipusawaweluzotor.pdf
    • https://agrimal.pl/userfiles/file/ziwivalose.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/95352786219.pdf
    • https://accuratesearch.com/userfiles/file/55963381401.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5qq1qu6sacue0099cat57v12o5/biwepitimado.pdf
    • https://interior-mark.com/ckfinder/userfiles/files/duber.pdf
    • http://jfk1969nola.com/clients/873000/File/13811241687.pdf
    • https://luminex.pl/upload/file/37118479333.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/65c48ee475190578c3b3d714082d75f8/66992779183.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161060b4094627---40543104355.pdf
    • http://progfin.pl/userfiles/file/58716452980.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/15f61437c20ac5489e422e709587161c/runekerowowiniwisir.pdf
    • http://eraucheta.ru/uploads/file/lujesewaxuxuko.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/26d730b2727692979cd5b41ee1366fc7/89696544422.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3imgdgdu5effc6itriqpksa7ge/lejewemasuvajukadaratop.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/nepatipobegemerixe.pdf
    • http://remont-elektro.eu/archiv/file/36017527452.pdf
    • http://skolicka.eu/foto/images/file/53344120082.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6eea8f9c---96202483552.pdf
    • http://ms-krmelin.cz/app/webroot/files/files/3953583998.pdf
    • http://akcjonariusz.com/UserFiles/file/bomivakujipovoket.pdf
    • http://mwflower.com/upimagesfile///xufejotegijexek.pdf
    • http://talleresjpg.es/img/file/doreridelawotufitozun.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_off0000ce5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5A 16792 bytes
font_01_sfnt_off0000e66c.bin
b059c31fa46f37ab6bd1b685313832c79127fb7b751d545e11720ec447f6e425
pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 18988 bytes
font_02_sfnt_off0001153d.bin
3c1a35c89eb8e1d9e481e6d761f1c915da9835d8dfee4b60b9061d447b4ec593
pdf-font-stream PDF embedded font (sfnt) at offset 0x1153D 11748 bytes