Malicious PDF — malware analysis report

Static analysis result for SHA-256 e875098d6b8b096e…

MALICIOUS

PDF

83.6 KB Created: 2021-07-09 00:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e7d6bf7fa5263331af00bbd0a896f09 SHA-1: 33da99b850df9135c79a1491a4cb5ccc4befc8e6 SHA-256: e875098d6b8b096e4a26b9cd3f5ac02e61c28bde01c5987a405778b8a9f62281
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://catamma.ru/uplcv?utm_term=new+and+easy+drawing
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c9d0a31e---tudanopejeripu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7cbd2258439edf32487817ba2a576561/74805457353.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b64285ea592---bunigovodisiwa.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/tukshd2lueimb8457va1m69d9k/lijilisu.pdf
    • http://amon-syotengai.com/userfiles/file/bokeraxulujonilok.pdf
    • http://andreaslasnik.com/data/files/xelepupomoguviwi.pdf
    • https://sportnazona.bg/f/uploads/files/12356063507.pdf
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/soregikakusebizaxagapa.pdf
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/16736279899.pdf
    • http://tw-sincere.com/upfiles/editor/files/12089178763.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16090750967c49---93971876836.pdf
    • http://seamcc.com/UserFiles/files/wemagivexe.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/2b19aa5eba1c11bc09681d029581c3a9/33183093160.pdf
    • http://tokyoto.pl/UserFiles/file/lajub.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bcee276f2---xukuwosum.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608528feded42---fokuzapiteju.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9bd7ea10514af079b8240cf8ac7a3769/41452304588.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/af9d82205a5d48450c86660a21552c5a/bixudogasurukivorobof.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160755e2009ff9---79984727925.pdf
    • https://btegypt.com/file/95359981013.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a080381e2aa---femom.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a9ada84a9763beea79010413c30853ab/50399200731.pdf
    • http://crisismobile.com/ckfinder/userfiles/files/meponixonege.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0038c4971f---19633149014.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/3205mhn2mkero0m4jhqqir7ce1/nafunefuletutisar.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2fcf309c6f4ed3416f3d3e5a0536248e/38346121837.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_off0000e6e8.bin
5532d957b135d92847e5e2138a4eaf0be9b005c38461513247133f119ad02c63
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 10336 bytes
font_01_sfnt_off0000fe2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 16792 bytes
font_02_sfnt_off0001163c.bin
644f2fb6ec9164a8b88039279f073dfa7c387742500c1ddaf46b97588f6f23b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1163C 16648 bytes