Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9618870375c6cd9…

MALICIOUS

PDF

87.2 KB Created: 2021-06-26 21:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d666200b0177642e5730e69353be3496 SHA-1: d508b2e580a9f5d5e53e3c3ad6df0e9cd7910fd8 SHA-256: d9618870375c6cd975af9ff9e7a6d05eaf3057359c98e602b8513cb400ef9a61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised CMS platforms or disposable domains. The presence of external URIs and link farms suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://actor-conseil.com/files/file/tolejubamede.pdf
    • http://agarimo.com/archivos/archivos/rumezojatusewiletoji.pdf
    • http://mashtalkandil.com/userfiles/file/dunepejun.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/tcai94hbipnr9o7mjt1515kidk/72228686313.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/eotjhompe2a6n9s2grmhnplc1u/vopuwabur.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab52516d9c---51937431980.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9d34c8c21dc65ef041365d4fae4d4347/dalojalevelavefolegutofag.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/0c67c9387f129383300d5ac6e548521b/gugorulunebipojogorafijur.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6319e061fd23dcb10d8f2d8ad3f7f730/wubowudugasogo.pdf
    • http://qunjl.com/userfiles/files/69755124340.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0e17ca5a---zavuretutajogebutera.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bea3c99515---nokufemokejujejerizal.pdf
    • https://kodcomputers.ro/2664/uploads/15598973642.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b357377f651---nopivadoletufapesibenedo.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63071ab7e---38208944137.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/bivitofaxuluxejutubev.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd0e29b716---92371461908.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baad2d06b76---49327348811.pdf
    • http://yishiweb.com/upfiles/files/20210618_145018.pdf
    • https://oklogistic.lv/upload/file/wizarokaxusomokibazife.pdf
    • http://skolicka.eu/foto/images/file/sejijer.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/2efdd53f546ed34e21d05cb8c5ccf556/18462084505.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed7a6b7d64---25043404629.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5aeea4910---31013451375.pdf
    • https://irrisyst.eu/files/file/vomimavebinerumovemam.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/49a9aa65d74a74e6d5908fdd3092a960/81274008109.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pagemaker+6.5+to+7.0+converter
    • 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_off0000f046.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 16792 bytes
font_01_sfnt_off00010858.bin
11028c2d8c7aed1b4e302cb65c14d45b79bd0367ac2ffc8f99a2b7cb0ca974d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 17348 bytes
font_02_sfnt_off000135b7.bin
e169d8342d699cab67b63445d964b45c541849740394d8553ed9b05f3f019bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B7 10964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.