Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb04ec40ea7e4337…

MALICIOUS

PDF

82.2 KB Created: 2021-08-12 08:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39d9c9e706467bc94a83c2194779fe63 SHA-1: 1da7a4a68d0adb635b414d5df73e90f824fc6910 SHA-256: bb04ec40ea7e43373c0b19da852fe8afdcd052393d61cc2af927f054c572ca76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e5643fd7c89---bipitepizu.pdf
    • http://wjcopy.com/upload/files/gatafekafek.pdf
    • http://karimeh.com/public/userfiles/file/tosajorekutekokigoraxe.pdf
    • https://scavilecis.it/userfiles/file/71402019148.pdf
    • http://nfc.soo.jp/file/85068740996.pdf
    • http://lagunarent.lt/ckfinder/userfiles/files/66991114757.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/bec3283ff85bc511fddbc21c3f405651/lowapasuvogut.pdf
    • http://chatfieldfarms101.com/userimages/bezulik.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/repowomosavufovevivopoj.pdf
    • http://effektfilm.de/files/file/23404196544.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9614581467---26729024222.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090ea16e926a---53779580507.pdf
    • https://projectmine.hu/ckfinder/userfiles/files/kegapapegimerujo.pdf
    • http://hurtglass.pl/upload/file/66860831562.pdf
    • http://alpinedelhi.com/userfiles/files/74752581164.pdf
    • https://razredna-nastava.net/files/susadilebawibidixe.pdf
    • http://cayxaotamphan.net/userfiles/image/file/nitijedagufemol.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/gahttnc4ehaf6136pi7b2abn4k/labefexabatisimufo.pdf
    • https://transport-vehicules.fr/userfiles/file/36733811661.pdf
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/jqtsjjbtihm7pbgu5ism3clkjp/99755631754.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/9df517e9340c8512d1255532c2adcce3/nosab.pdf
    • http://sportschoolindex.nl/images/uploads/tabazuwuf.pdf
    • https://geneticapanama.com/userfiles/file/28839503244.pdf
    • http://www.companyforte.com/imagenes/editor/file/1203214439.pdf
    • http://bscartridge.com/pic/62800410608.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=adjective+clause+questions+answers
    • 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_off0000dca6.bin
b8bb5ff793170b66a180cd6564f1308866657b93296f2e4c0f432f5be6d77efe
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 17072 bytes
font_01_sfnt_off00010904.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 16792 bytes
font_02_sfnt_off0001211b.bin
f84f4630a662c993b1296000c3ba3831fca0156f751488044c72f15256873139
pdf-font-stream PDF embedded font (sfnt) at offset 0x1211B 10872 bytes