Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5346e570449edb…

MALICIOUS

PDF

129.3 KB Created: 2021-09-07 06:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bc9b77e50e4535c59f327db0d790f526 SHA-1: 3c01a6189ed183c98936c8980de6bd00b5ef523b SHA-256: 7c5346e570449edb22cfc64171a594902938cca8b03116895809ceb0dc8f4eb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to lure victims into clicking through to malicious content. Although no scripts were explicitly extracted, the PDF format and the presence of external URIs suggest potential exploitation of PDF vulnerabilities or social engineering to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=baburnama+pdf+battle+of+panipat PDF link annotation
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5885ae75---mosepodofunifabirep.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/02fd10e17b82587ff1bbe14c97393cfc/damapowelivijatan.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/jb2cvhei82gtl1jmhue5aamdjv/45839743905.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/36019299389.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/zuzobuderesovejonuxuxapel.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94bd52dd0a---61827108885.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f687bc527---nedidirefevu.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/775a5a0561d8f2daee39c48545f80548/dazasirewo.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/52476869846.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7s9igq607pl249rskmoi58tm5r/xawuze.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/4451262524.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e8247eb69d6---soweke.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/ganorin.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/guwenosaletojafogemizo.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/nitipatufolixiwuroviwi.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/15116006237.pdfIn PDF document text
    • http://htygroup.com/upload/files/lilulepupulobow.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16125ace289bd3---xetavodesunudomed.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/losuvexajivazivazekugobiw.pdfIn PDF document text
    • http://siembra.me/uploads/files/zepir.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/tuvukatijegofuguja.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16105dda5d348c---ginalozonajejukifevalu.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19684 10784 bytes
SHA-256: 1b427c92632bd517e108c077ace320aeb653f44788455a1fe3d0400d82892736
font_01_sfnt_off0001af11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF11 18628 bytes
SHA-256: 9e53b5b19ad35e929f1e2a93776327d27326fa4a67ef897050ed815095f121a1
font_02_sfnt_off0001df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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