Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a5ebab8be4cde5…

MALICIOUS

PDF

90.4 KB Created: 2021-08-14 13:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 036207c760cdf6e604c1b474259f937f SHA-1: fe757ba952b41ff2b97f09814113548251119c52 SHA-256: 06a5ebab8be4cde580d04aa02bc80af21b2f628a9ea496e50927ea09c1ec8f10
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on potentially compromised CMS upload directories supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://liweisteel.co.th/ckfinder/userfiles/files/dotijufepikiwodemoxi.pdf
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/rinugam.pdf
    • http://lutechmed.com/Images_upload/files/bijonav.pdf
    • http://s-privod.ru/userfiles/file/55347694050.pdf
    • http://gourmethousemacau.com/UploadFilesfile///22051002208.pdf
    • http://lab4050.com/upload/editor/file/sivevukudadizufeb.pdf
    • http://promocode.lu/userfiles/files/70631766550.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a622cb76fec---93545995703.pdf
    • http://safetypath.net/cms_images/lolulororiloworuniv.pdf
    • https://jackyrouxmethode.com/userfiles/file/vutetekumimex.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709de8e1897---57514873964.pdf
    • http://moscowfashion.net/content/xuploadimages/file/fojazunubugopakomowun.pdf
    • http://industrialdevices.in/uploads/22344509638.pdf
    • https://palcev.ru/userfiles/file/24279506779.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fd2b31de025c685181053ec1c2d96db4/razubegaxoni.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/d1f31nq4deshbkldk6h6v6ue5b/39200822340.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/26919b1c7952f128cb65e9da6a13865d/93099680734.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ebj6t0pbe79lr1dpbkia53v8b5/24365751710.pdf
    • http://hrdiborice.cz/erucom1/files/files/92318956213.pdf
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/94899456644.pdf
    • http://nacnsuaa.com/clients/4/49/49ab1acc6c62b5a39110d621a19f71c0/File/lebesasu.pdf
    • http://lhs1965.com/clients/880801/File/bilalejunofalunemav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=never+back+down+3+full+movie+download+in+hindi+720p
    • https://mediaget.com/userfiles/files/dariponefa.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_off0000fbfd.bin
288e727b056406eca5d34762aa921f47f252e69ce7b888ba96716d6f78b18ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 11544 bytes
font_01_sfnt_off0001171c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 16792 bytes
font_02_sfnt_off00012f2e.bin
9a89a6a2beff283d5c53927ef61aaaf796ff4f90d57757e79a2f34599c259e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2E 16748 bytes