Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d02b39c0e08acf…

MALICIOUS

PDF

72.2 KB Created: 2021-08-14 00:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9a102bc3921b2e835e1d1a13709aef7 SHA-1: ece5869f0147b9b3c66f026a043f04575ae390eb SHA-256: 29d02b39c0e08acfde11001b194e7e19dcffc16871ac380815f7e03b1187c25c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=what+is+the+salary+of+a+marketing+manager+in+canada
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607693fe01deb---todetimonelem.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qqi9o752k8lnlkje040da1hfo2/bopolomanusujogedikivegi.pdf
    • http://kimyasaldubeller.com/upload/ckfinder/files/xinazopoxopuf.pdf
    • http://langmoon.jp/js/upload/files/89420294041.pdf
    • http://architects-desk.com/uploadsfile/soluzuf.pdf
    • http://fabtur.ru/upload/files/17372761970.pdf
    • http://ahcxdq.com/uploads/file/090507528175.pdf
    • http://zap-interactive.com/uploads/files/xapike.pdf
    • http://asja-doll.ru/userfiles/file/96744050359.pdf
    • http://arunimaflavours.com/userfiles/file/37720419211.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e9531aae9af6fcc87c845a73c742611f/gifabusovapitukudot.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/o7pn1haopa6a9chnfo0k4dflj4/19169938254.pdf
    • http://misterholidaysanprisco.it/userfiles/files/jaxixam.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0ddab745---nejarogunexexuj.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c01c42621e4---wadogotewuredebaburi.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/s7g3skrcdtee13brvmd10ji16e/47700804158.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/d642200fa188f7c30c01af9b6def8b8d/migojivilufijigodanaweduf.pdf
    • https://avonsteel.com/UserFiles/file/jiziruvobusukapar.pdf
    • https://nffcd.org/userfiles/files/94439333863.pdf
    • https://eyetracking.pl/userfiles/file/lefoporotexobafejozujogu.pdf
    • https://homecareangels.ca/files/files/files/zogifilajoxidekal.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef9d3f24cc---sifabozadug.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bdqlr3fgbaj6h3a6l4uff7du03/48992515548.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/50497287677.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_off0000b930.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB930 16792 bytes
font_01_sfnt_off0000d147.bin
419edf826048b27b25f504392024c7791eac807f660d39517b117537dbf4e9d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 11124 bytes
font_02_sfnt_off0000eaea.bin
8993e204458cadfbf4d044dffabfbbaf10bfa488df685187c7ddb58aade691f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 15536 bytes