Malicious PDF — malware analysis report

Static analysis result for SHA-256 579f0edec1644676…

MALICIOUS

PDF

86.2 KB Created: 2021-07-22 23:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a46edb114f8d64303b0ed76b7025735d SHA-1: b7c46d2c9c7cc676e6996af105d95f4248bb05c4 SHA-256: 579f0edec1644676542f86e58041b47e8004f27a9ed40a6fb67b15503f1e0482
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ad581ece---lefow.pdf In PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/1d198abbb06de94f71129868eb11af62/25363473030.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/2982197d41d76d6779d86ad8f15ef863/demexifolaxinufigageno.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c9216b18a73964b9a92492a47030ef1b/pafugikepaselaviriku.pdfIn PDF document text
    • https://hgb.se/filer/file/rolazemokazeme.pdfIn PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/28181152512.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/hnhl1mh4s5lh74ppqbs35p1u10/demelazoginavipi.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/jowupekovurezoredax.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/24334896727.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/muwudoxisubefowekemisifap.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/13037370760.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///81347683179.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/53690197895.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dac69eeacb9---9347811688.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af64a3bd071---jubebidofozizusorelojiwo.pdfIn PDF document text
    • http://uhli-janmaria.cz/userfiles/file/kidaralaguvijugol.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/lavifazekesidevojodakuza.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/64884953273.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/bekup.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/zasatobifojunifumavi.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/tovananurenexeroneduna.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/03pv4k0rktci93tilmaoon9n92/betabinagakunolapefuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=family+anonymous+near+mePDF 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_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 10364 bytes
SHA-256: 295239b73a9aef739d2cc9c044413dc72457280797b09bcb679c0b56aabb8c80
font_01_sfnt_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 17320 bytes
SHA-256: 46c4966cfd7cbfeb6564574d85d3c66911279c8d1edfc484aa29ffd6d57f6f62
font_02_sfnt_off000133c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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