Malicious PDF — malware analysis report

Static analysis result for SHA-256 3242b01d05ef0db0…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 11:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5112053604a910e239c0c08d7ef26af5 SHA-1: acdfd488f9ff9f232050ad404dd72aea9eedbba4 SHA-256: 3242b01d05ef0db04069b7b165b6c60963f40d267d55ac3e9f301a4d3e0b59dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and ClamAV as malicious, specifically indicating a phishing or trojan threat. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing pages, serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://guides2alpes.fr/uploads/file/vefazinukavikatame.pdf
    • https://slotpt2.com/contents/files/57126503297.pdf
    • http://termosystem.pl/userfiles/file/lasewomi.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/xugetevivagezaf.pdf
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/fiwazenu.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/df0a773ae197a5d522315e42974150b2/69018975930.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/835qrnhngnff7pbhbkt5egncb0/94665087535.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/kabn2khbu85qu5snvb5k5b0rvb/vaxosiwegaxidikok.pdf
    • https://cahayaapi1.com/contents//files/wipubejisezofu.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608240ec61c4f---29992569072.pdf
    • http://aftckwt.com/uploads/file/roxupivabosepatanoge.pdf
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/17675210012.pdf
    • http://bjavc.com/filespath/files/20210811083519.pdf
    • http://pk.mo/userfiles/file/51232492205.pdf
    • http://akinmedikal.com/uploads/file/52217436358.pdf
    • http://livestocktool.com/d/files/17669529669.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8ef33df79---rikoninufixebajekejofo.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/7a77cfd1ce844a93db41ff642e7bb317/89181478985.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1174b2f3f---72346065087.pdf
    • http://absigorta.com/E/file/mepepamitidajedi.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5bd313ce---97107563022.pdf
    • http://shipagents.nl/uploadfiles/file/71099889400.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7caaf9914f---96683731745.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083832ac7f02---20378534077.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=they+don%27t+really+care+about+us+lyrics+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_off0000daff.bin
34ffcdb020c6c76b7e0c9019450036c8a94881ef1314e1a269671cbe2122a60f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 11068 bytes
font_01_sfnt_off0000f48e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 16792 bytes
font_02_sfnt_off00010ca0.bin
39d8ccb6d1c3993ec81021f2001ba6e4a32162e6843d968074f34e464bb77f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 17884 bytes