Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ef462cce7147ed…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 13:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89a22e2e45d39f182b28402dea79d029 SHA-1: 334205d8dfca960d15c6d534589c411707816444 SHA-256: 21ef462cce7147ed0601f746f35781382df1cd9089e67480a402393b0324bf43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://pensjonatagat.pl/userfiles/file/savabumimop.pdf In PDF document text
    • http://americanewbie.com/userfiles/file/kewigepopumepal.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/tuwivanogimawuluxerore.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/91423053400.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ecgc4loqg02elc4j8ng2gqhq2m/92446792791.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7bc6f6eccee1ad72036e615a5ea0b5b8/vadenowevuga.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/3hh2u02htcuviulqfr584c2dhd/piromaziwutizam.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/28726683595.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/87089574005.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/68af660146a35cc596f531db5f488cdd/46104878563.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5f672d73d---xuvegijomunobowor.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/zanikagoxezedinojarufok.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c26d9317e1a---99379949513.pdfIn PDF document text
    • http://tano-cable.com/d/files/62027727072.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/risuman.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/gebupu.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/cd7369eeb3cb425e4ebc12fd9314b4b3/wekadifiwojejajosinawa.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/14561691296090ad0209c62.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/fatuxufupelok.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/25841785197.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c25e0e525f0ffd2fd7bede8d0b8689a4/runefiwegijajifunorezakut.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071ecbdc905d---didunekag.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609252d41ea01---20309677242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=duplicate+pan+card+application+form+pdf+2019PDF 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_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 16676 bytes
SHA-256: 079be878bf2340f348035b9af88c598606a3c8b4857c1cf07a03d472b7bb0af0
font_01_sfnt_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 11176 bytes
SHA-256: c39b90fc4b403af2793cc00a01abf20a717b60c9174f927e3ee93de164254f47
font_02_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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