Malicious PDF — malware analysis report

Static analysis result for SHA-256 0754bb21d1f149b1…

MALICIOUS

PDF

92.4 KB Created: 2021-06-26 15:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d9327d30c802c551e692503afc927c8 SHA-1: e903192b40eccd059622a452f73c59c8d0c15782 SHA-256: 0754bb21d1f149b1b77a6c150d94c406d700f5ee7d3060b2ff83ac02cae89ee2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=the+things+they+carried+true+war+story
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/6e3c447362477334e76c98aab93f998d/41499189462.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/12cb4d3f026c9e920b6612d3766d7296/52594173037.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/23071173396.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/65d0493152b27437f5546596e2e0f1cb/35879301334.pdf
    • https://pet-fashion.ro/mm/file/tominatowalilenoxure.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/e5de32a241120803f4864e036628d4a3/puzasenetimanov.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0f8ffc0e60df90281eb5685e9b5e433b/xikuluwuremavobuditali.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c492895eff9---8400762928.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a2115fce11f---32825514965.pdf
    • https://www.profiemg.cz/upload/ck/files/54997978528.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/4ekis6tqrfmgkqs44mmoqko2kh/jimisilekemulomimaleli.pdf
    • http://lsbwg.com/ckfinder/userfiles/files/20210621/0819524294.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607264621bb25---boranubobezifiwo.pdf
    • http://dzbnf.com/upload/file///11209062942.pdf
    • http://aweibel.com/Photo/file/93165745781.pdf
    • http://al-bandak.com/userfiles/file/vonedovesotaxufutotilok.pdf
    • http://jrpst.pl/userfiles/file/77005328560.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b83c6005a2---37326343456.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac86364f8c---2111264434.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/99537f7433f44399d2a4ace93ce748ff/61953287080.pdf
    • http://anhuicrew.com/upload_fck/file/2021-6-4/20210604203206639152.pdf
    • https://abofahed.com/userfiles/file/navujotupukesawez.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/31094644284.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc1c92a752---zaziro.pdf
    • http://vce34.ru/attachments/file/19858870526.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_off0001040f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1040F 16792 bytes
font_01_sfnt_off00011c21.bin
2c5f64a2ec39a6cbdcec7e45c8fe70b01d13b3c46a97147a9393f3b24179fead
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 17420 bytes
font_02_sfnt_off00014955.bin
4bdfe03253df41d186a687962a8aa83ee5ac5f33492b773113351c9289e4cc93
pdf-font-stream PDF embedded font (sfnt) at offset 0x14955 10868 bytes