Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eb21ee7663acfb…

MALICIOUS

PDF

133.0 KB Created: 2021-07-30 20:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a371e82a637e02dae0bc3872459c1da4 SHA-1: 1d1d73c5c5b754f9c754681325d48ad743ac3686 SHA-256: 74eb21ee7663acfb1165e32d5db1e15cc6bc29edd9bc8e4fdd78d8647b330265
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware delivery attempt, likely using embedded JavaScript to facilitate redirects or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

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://championshipsportsrings.com/clients/23492/File/78999214536.pdf In PDF document text
    • https://red-adlay.com/upload/files/timamarewuzud.pdfIn PDF document text
    • https://wecareprogram.org/images/file/xobexumunapizitisez.pdfIn PDF document text
    • https://cecprint.com/images/file/pariwedus.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/digubevu.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/1me921rnt9k9p1t2sg02l1a285/lawuvunalizusoxonitolu.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/fodoligalisexopakite.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/luzerodob.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/bozowonomaxata.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/9d27fbedf03207e54e7ef3dac5155dd3/8396767708.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff7be9b85---vaxabemur.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/94181789559.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/4e74jlpp6daro2hugru3qs4qup/48806128473.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/91814989065.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608352b27da61---1016579747.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/giworuposanowogarezakaxij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc1cf3811---molovilevisazagapax.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/q58oi5g2or9d4l62laiivjatq3/lirolalofer.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e97a168fe5---vegekatolowosusimanurunes.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/wudopovuka.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/rowegagegu.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/49b6253be9100d943882abfd3cf5f777/vuvenekavesemisekudovoma.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/xeduxi.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/mukudekoxiwudojisivuzi.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/pisew.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06c16d42a---88020483155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=igo+primo+maps+europe+2018+free+download+and+updatePDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017b7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17B7F 21400 bytes
SHA-256: f56edd590ecf84db8d76251cc24a23fd04c8e748a43a6ce85cefe48ba0ea85a1
font_01_sfnt_off0001a0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0D0 18072 bytes
SHA-256: e376784e9984bbda9672615463aaca4a3c788c35b983dad1d82ca17117667b2d
font_02_sfnt_off0001cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF12 11480 bytes
SHA-256: 9799f7e0cf9e846cf0a79fafcdeee7d6d0ce1e3c7837ae6771076bd2c2d53250
font_03_sfnt_off0001ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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