Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2c80d2006dd639…

MALICIOUS

PDF

78.1 KB Created: 2021-05-26 05:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 52a16e79555747dd3e913345f2e4c4f8 SHA-1: 6817fb5d448d72eec32c8b378b449780b0e335a9 SHA-256: 5e2c80d2006dd639b34e884c3ca2c5140ae86744e141b7c43d42f5bd6a0cf062
196 Risk Score

Malware Insights

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

The file is a PDF that contains embedded links to various websites, many of which host PDF files within compromised CMS upload directories. The document body, though heavily obfuscated, suggests a lure related to a 'Train dispatcher 3.5 password crack'. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent is to trick the user into believing they need a password for an archive, which is a common tactic to bypass gateway security. ClamAV detection and ML classification further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/f6elgdsr1u1d3aes0qbqlb469g/85406441954.pdf In PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bd109cba2465b9e034834897393ada80/fedinuwufo.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0a8758cc8b63ca457f20a14b34a1a174/nuzowi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/isfpho7812clkkp20jmn7ebje5/52017792006.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160958e1a200f9---pewijoxawewuxi.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f581001b6d---56822738100.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ddc1e1a82---kapadijalodulafanifo.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210525014825486.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/4a7b1f5di3pvcs6faa9vkj6hre/45262328999.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/322eae93c0706bded82c61110278ed14/3701648795.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608d21a62fd53---68059104696.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/68652988978.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/7nfbaprgcc0hqag2gfglscugu0/gipanozuxitaveponep.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077815d0cb03---poravixojiruz.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/d0d5437449d3e435cfefb39d22613125/vizutolawodesare.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/rizemovozudifabimigezalaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=train+dispatcher+3.5+password+crackPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 6128 bytes
SHA-256: a8e5d7891fa004cf2944becc34748ed404279d8ec5be8cdd5b28af256e3db535
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 5556 bytes
SHA-256: 8b7c3b9b22cd8bb6f22fca3c4f809e2d6e9ec72132043b688c59b931530ade9f
font_02_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 11276 bytes
SHA-256: 03f9c3457e6ab09e23ee4dadc405a2765335fcd28741bf85bfbd0e354da7f016

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