Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3ea3f85e0d8808…

MALICIOUS

PDF

84.6 KB Created: 2021-07-12 23:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2734068affd00c1c225c2f9ce227606 SHA-1: bf85c8ad3d484462130a1ca0d4a8a1c903c7da3f SHA-256: be3ea3f85e0d88083b24f3fdbd04b211885aff1ccc3b973cf59a7e959d12a463
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely serve to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://leesman.com/wp-content/plugins/super-forms/uploads/php/files/b2ab2de701cbd64fe53bc8f97a78e833/tonisejiko.pdf
    • https://bem-sa.com/img/file/mitulasisizodepu.pdf
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/2719777795.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0a26107bc5a47d18a58221a333c45d06/8420255198.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/87d51d781f8f82acf2a7f99ec1cbf23c/42513268034.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160711f9d09d5e---zadukoti.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hpe6m5o43m07ogsb3ep326fgpg/fekixu.pdf
    • http://sjhrz.com/images/upload/File/kanumop.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40e9174ce6---31148010636.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/nu16e5diouta87uhr0mf1ns987/mewurilulewuxixewo.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fd0e6dda3---771403862.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1b1de9bbdd6516ef2f0890a586423d50/dafinugopoxizixaxomop.pdf
    • https://ozmutludokum.com/userfiles/file/69345149179.pdf
    • http://easyreturn.store/userfiles/file/wupovir.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760942646c1---36206937154.pdf
    • http://activesolutionelectric.com/images/file/nevapituwesawoji.pdf
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/dedd12425ce2fd7a932a9d3d098bfd92/rijovi.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ks25g32ofq4uhlekn4ek3nump6/vobiderasa.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/88248fcb7ec8431e1acd674d541f1a01/zutilurog.pdf
    • https://warungmimpishio.com/contents//files/94423027976.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdcea2059---lotiji.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jrh0b1f4g6kuqqfgkgl1n1f901/dofatuzosapifasa.pdf
    • https://mygenius.ru/admin/ckfinder/userfiles/files/79096208941.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=gta+vice+city+game+download+windows+10
    • 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_off0000e778.bin
35552122da412eb6288834fb4fa653686512b8d5bd245052430fe2d0ead49c34
pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 16872 bytes
font_01_sfnt_off00011348.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 16792 bytes
font_02_sfnt_off00012b5f.bin
4ee2c8ed45978bba2cf58e77a1d7f6705c6e39887b94426b171e08140d8da0e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5F 11092 bytes