Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c6e688d5f6fb54…

MALICIOUS

PDF

87.7 KB Created: 2021-07-03 00:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d2e9040abd41b8da4ac66ac3304b1c60 SHA-1: 5c8ddefaa88e9fbe0c87cb61c061ade704604209 SHA-256: 74c6e688d5f6fb5466888514f2c90f8b552e34cfc5c48cd7291678aae668315c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating it's designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure points to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/jbg38fqv2vbotrueg00j6gks2n/mewasesunajitarajivan.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aeebbe90c2c---vuxabesopixewonegubev.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd50b6ea62b---befevomuxodafukavotekugab.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3cceo1i5hm71sfk87al55ao0c9/76211269904.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/48786230245.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ce35a02b64252668bc83254cb124377d/12604366389.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/kijatunelojekikedorof.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b5d28622e---63504453340.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d11eb77e84---26637512986.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/waxogomukepajotafa.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/miranu.pdfIn PDF document text
    • https://oversaslogistica.it/file/43924421007.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/25298532985.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0df05ea0---xixutojapaxonol.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/15035264599.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/tegelabimolaxalixi.pdfIn PDF document text
    • http://furniture83.com/upload/files/74860105334.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082601a8dd56---49530276378.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609532d51dc5c---razajimujozugijepapipe.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/wukivirivok.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a3a243c84---sorapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=fissure+after+deliveryPDF 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://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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 17076 bytes
SHA-256: b8d4efed7a772f7a685897be9f72266499cc5de07fe8816727b835fa2a998001
font_02_sfnt_off000138f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F3 10380 bytes
SHA-256: 5994689104f14d1406a504579a29ceca5ef6029d5ccbb7224bade0cc3f8e6998

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