Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7ee42834f70faf…

MALICIOUS

PDF

200.3 KB Created: 2021-06-29 05:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5fdbcc5bd51af196209a997ce3989898 SHA-1: 485d30f26940cfe7eb55b87dc69118439a0c07ab SHA-256: bf7ee42834f70faf327dd59015339034a8f62723370fea60051773ad82853306
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and SEO redirectors, indicating a phishing or malware distribution scheme. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://apexnepaltravel.com/userfiles/file/podufono.pdf In PDF document text
    • http://myucpb.net/userfiles/file/21322261729.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/42704676774.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c27b121c5f9---suvuzutosaz.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/732873f3f9f1fe8be026e0ad4ac868a4/debisatawop.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/tilitinatepotulezijox.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078174e17755---jamizizerenapigakuzojis.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90d5b5be7b---dadugosin.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/patijinuvap.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/bofizeforukelukerabebuwe.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8dka4tamindal5rk51pjgl1899/40731021810.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508163716.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/1d94e2cc72f8c6d6ce7d43d43c9dadb6/71492101759.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/62227078580.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/temujutij.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e007bb8dc7f68cee345889167b7f8158/zemopewofazunuk.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/bf36f0e40453c3d1f30a0af82252032f/3326936171.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/vawitafufuduxeraterasuno.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/bc0cd59c59348712050c95fc1cfcf278/filabijapiguzuteniwosulak.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b87000fdf---36309550984.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/tudiwanadikoxovubelumi.pdfIn PDF document text
    • http://funperm.ru/content/file/81730970706.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/tuwifudet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=i+just+want+to+make+love+to+you+willie+dixonPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B00F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002c826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C826 10952 bytes
SHA-256: caeb98a99fab86939bb36d3d30f12d5a62bb2b015a369c2575c52f5c2da44f39
font_02_sfnt_off0002e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E189 18144 bytes
SHA-256: c39c20274af60f8e17241c99c78e2b8dc1dfb2fa3e2db178faca033a400a6136