Malicious PDF — malware analysis report

Static analysis result for SHA-256 038f622d06bd33b0…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 12:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb6b327fa28714bc39856c34dd690909 SHA-1: ad114e6bb3fba77c862b6327bd92006b1c48c769 SHA-256: 038f622d06bd33b0a3b2a8ca97f5112c36873e97aa455dc97fbc01a9df2cd9ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=was+were+are+is
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b912235c5f0ff4c552f70dcf47ac7916/sirebo.pdf
    • https://betalinktech.com/blmedia/file/givikebori.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b5831dd7e---tavosanidevikoxab.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/km9ivl13odihgl340ngdatgmc3/bididamexij.pdf
    • http://2ds-creations.fr/userfiles/file/negukesuvelosilezak.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c05b0c139---92556830452.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608789052869b---wafafinererakizugimolepi.pdf
    • https://thefertilizerequipment.com/d/files/88543896953.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b5aaf0043aef4a371ba36f18364eb8f5/86103632858.pdf
    • http://ansing.nl/userfiles/file/45076871786.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4b9bd4a0---vakevonixajajosovixomef.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/35584449300.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/23819ea03efe19c7caf7837ac25c1e30/1849185331.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/10b0a72f66e86a0100ee028f4f5c4cbc/97167683008.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072211ef1a14---piteboneridezexewi.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e517524b09---wonekikelixubix.pdf
    • http://bebelino.ru/userfiles/file/54232683366.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac557c17d---xowanuxiwe.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2003fca83d---jubub.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5e7f3trm44l7aeu9uma4jnmbqb/fukevijuvulivuz.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814ca928692---zakopogorutebebegomewiza.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b004964fc9a---5334965050.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607419f0a7515---mologazoja.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 16792 bytes
font_01_sfnt_off000115be.bin
7491ff532088183184ca0b8fbc17abcd8d0e84b1f970388dffcc3e3087d36146
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BE 9812 bytes
font_02_sfnt_off00012b66.bin
d6f574862a559153d69e8a21144d5079b9a98f03a16b4e4a5fddf403588ce9ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B66 17772 bytes