Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb63569bb4175328…

MALICIOUS

PDF

84.9 KB Created: 2021-09-21 08:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f269915fb03987061b363fedef9768d SHA-1: edbf96d7ac9ef4ddf0e0e1ebf663b2d1066d0b61 SHA-256: bb63569bb41753288fb04cec1873233ff26de0fd077849034ec96983ffc329bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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://dishandspoonproductions.com/ckfinder/userfiles/files/78037128086.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8ffb98d70c5a1eb711b88dd523972073/wurokuni.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/51172886454.pdf
    • http://bogaarchitetti.it/userfiles/files/pafinesofosilajuzaxepin.pdf
    • https://ww150004.linebot.net/upfile/files/20210910030135.pdf
    • http://fulns.com/uploadfile/fckedit/file/16306181164c5S.pdf
    • https://ratoempat.com/contents/files/lomevezilakod.pdf
    • https://cet.sk/res/file/kapewerimuva.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6kj3hvqlqd0dd5b280uu6hdv51/54840057618.pdf
    • http://fundacionecla.org/resources/original/file/kozorezitaj.pdf
    • https://kalitelivideoizle.com/resimler/files/27005550099.pdf
    • http://dostavkaturov.ru/files/file/99370031135.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614306ae32aa0---44008289375.pdf
    • http://stisk.com/file/mebes.pdf
    • http://geometrarontani.it/userfiles/files/66032048973.pdf
    • https://lp-tracking.com/userfiles/file/zizuduselisarubizidemup.pdf
    • http://szyoujin.com/UploadFile/file/20210901121403074.pdf
    • http://tauroconsulting.pl/userfiles/file/kinopebim.pdf
    • http://women-for-marriage.com/ckfinder/userfiles/files/95190948630.pdf
    • https://next-engineering.com/userfiles/files/59469588247.pdf
    • https://gosselindesign.com/images/from_fckeditor/fichiers/81888365299.pdf
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/43293186061.pdf
    • https://portofcrotone.com/dati/upload/file/rokebulub.pdf
    • http://wamer.org/userfiles/file/44753344193.pdf
    • https://insolite.lu/img/userfiles/files/37736431634.pdf
    • https://vgi-vn.vn/app/webroot/img/files/98642072210.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=mr+comics+app+apk
    • 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_off0000e50d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 16792 bytes
font_01_sfnt_off0000fd24.bin
2d654e9c9286cbea7a8958cb40ea6c8b7eb931b2ff200597f4803913c3fbaaa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 10240 bytes
font_02_sfnt_off00011429.bin
1ea21b3064da2e188695c6e508be68c05b6cc07d884d7d9ce1cc509ac7ca9323
pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 19328 bytes