Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf947d692d87cd…

MALICIOUS

PDF

74.3 KB Created: 2021-09-04 22:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3fc690439f74b5106fbdcd567efd095 SHA-1: cb0385d09ea2275ffe480c09d205e48b687eaf3d SHA-256: 60bf947d692d87cd8ef372f37eac7a24b10a745bdee7dfad2f57a0a742b9f442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm designed to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics point towards an attempt to trick users into downloading malicious files, likely under the guise of job application materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://bptramptour.pl/files/file/10696964432.pdf
    • http://i-daa-wl.de/userfiles/7921637368.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/fddba86e8c99565630f5f7aff555a0ce/61203139104.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf14e3ace5a---junofowataxubofipukazixov.pdf
    • http://villabrown.it/userfiles/files/tidesepinewojezowug.pdf
    • https://santchavarabed.in/ckfinder/userfiles/files/womikerudirazurelowegu.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbdd1420f---52310210648.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/f2f6ac7eb098974bab2f13bbacd0afac/sanisuzuti.pdf
    • http://htygroup.com/upload/files/938092382.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41cd16014c---romopawekerule.pdf
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/gevarijamezavoxobuxagiw.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c7076e45b6a8254d3969c14cd245dc33/98128696594.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608934292634c---jigot.pdf
    • http://hotelbelleepoque.bg/userfiles/file/95415632196.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e70e49c142---47436151359.pdf
    • http://seednseed.com/admin/fckfiles/file/87383808478.pdf
    • http://marinapogon.pl/upload/file/dolefevajef.pdf
    • http://mimarkamilozkartal.com/userfiles/files/radowusaj.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f2658d0ca91cb50ec23722e7255d5705/zezusetokefegolavelala.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c54e08a165d---83985163531.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a697a998f91---33649348051.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=cover+letter+for+mechanical+engineering+job+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_off0000c06a.bin
9237c62bb8c0eebca73d32d15d76fd5159c5a002cb7ac646470947908e906b78
pdf-font-stream PDF embedded font (sfnt) at offset 0xC06A 11264 bytes
font_01_sfnt_off0000da39.bin
a6e5a8467b45fca2bf4d3d5c9372c539b8721f318ea4db598e02205b0235c002
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 16012 bytes
font_02_sfnt_off00010323.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10323 16792 bytes