Malicious PDF — malware analysis report

Static analysis result for SHA-256 077ca65e3317dac6…

MALICIOUS

PDF

88.7 KB Created: 2021-07-29 22:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5025b666df2c813d40e0b8a5cc6a6b0b SHA-1: b514f8a3a13b22a7e9bbbfae9903e36f39a0136c SHA-256: 077ca65e3317dac6ff1258792ee2c0e34ef25064274cd0ad7ec28b710f5bb79b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external URIs and a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8438

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=clash+of+clans+hile+apk+indir+android+oyun+club+apk+day%C4%B1 PDF link annotation
    • http://www.impactit.in/ckfinder/userfiles/files/vuwefikukejogirik.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/55564805464.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/4ffd3be03ef034f5101f7a6a5560835e/rogemoku.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/gabugaj.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/fivilawidegavej.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/054fa04a1241bbbead8bdfe4fdc1850c/suwusaxegul.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/35111582915.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3030a30838---lalenula.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad942f0efe---56402841118.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/23640014298.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f769efc84---dozatitinunok.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/67561506763.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/zudutuzelavuxija.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/98278494093.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/30564211678.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/49885780255.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/hublt4vdtd5laahltubr4m51i1/ximapivesa.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/gasokuraxonogenazibibir.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f674271b1---47921433203.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/942429f60588d388cb5bf37ca2abcb52/fipoxemofe.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089523bc823e---lokoderuxepasogojovoti.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/rjfuopq60qjfvdjaqbibrc0km2/dejefuw.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/lewewijonovekarimawa.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/zurebixeliwuvixafegobaja.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 1672 bytes
SHA-256: 3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 11140 bytes
SHA-256: f9f3f065efd98ee4fbfd6289db170eefff728b3e7c26e81c606ad0e388d7c55d
font_02_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001384b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384B 20084 bytes
SHA-256: 7038a6f7ca68cc7e86c83a9a170ce05c1ac4371b501df2fef03e87197785f42d