Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c0a7e2da4200b9…

MALICIOUS

PDF

88.6 KB Created: 2021-06-29 04:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70c583596e9b722ba66c11d91b6c92bc SHA-1: 9ce0e8269b079bebd96399810b1f98856b9cbde6 SHA-256: a3c0a7e2da4200b94b8291f403c5260f4da8381f5576531bc6fbb01dff2a73bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous links to potentially compromised WordPress upload storage and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://rotarylaspalmas.orgdocumentos/file/68769854259.pdf
    • https://fwullong.com/upfiles/editor/files/rokavefovabuvif.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/39e92ae174d61649d5f0b4ca51762ecc/94354924748.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/b469cd026f42d4c0799213206a984172/najuz.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10945fc4b---25191945012.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ccbd35672---51400173341.pdf
    • http://abnicum.com/files/file/34791416470.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00d45dcc9c---12705100749.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/bad9ec0d4cabc31a6f7ce210e9c59faa/85115495292.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc49924d55---powavurusev.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08730d3d97---13490021583.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bcc0d5158---91875075181.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3de10587dc---95134687893.pdf
    • http://kursadowicz.pl/Upload/file/42031018468.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160907556f14e9---ramatenekaxasovosekep.pdf
    • http://palenice.net/obrazky_clanky/file/zowazoxatodinag.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16075c2c88dda7---11668475643.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607da86bda803---fipuzobejedibigulebakesa.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/cc7bed43d045ac631845a6318f59abea/gavafamajipizunuzofegigi.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ttebt1nu4vq8k1rf0o5r1k86i2/tujufitipamovoxugijon.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee36686c58---76890571904.pdf
    • http://uniroll.pl/user_images/file/kiwugewetetujixibivekem.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b794f1f250d---limafazelisodemijowutivi.pdf
    • https://alakharia.com/public_html/userfiles/file/33284469765.pdf
    • https://genericdiabeticteststrips.com/userfiles/files/xubokomoxofarud.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/mka33cbbtfflnh11ae7rdvmsv5/womozap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=financial+accounting+n4+question+papers+and+memos+pdf+2018
    • 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_off0000f33d.bin
e4354c511d54e98f9e2a82e6bc990f6198183ebb156a96ab410e70f9507baabd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 11764 bytes
font_01_sfnt_off00010eef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEF 16792 bytes
font_02_sfnt_off00012701.bin
d108f387f0f937af51092a52f9378545ec791431e6354fbf8eec7edba1f8a3e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 17360 bytes