Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7f451a27545624…

MALICIOUS

PDF

88.6 KB Created: 2021-07-09 16:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f90fa3507900745dcf095ca526208912 SHA-1: b92186b0cd52635f00e91b8ac4cbc212810704df SHA-256: fa7f451a275456247c47ee9711aa348e835afe37c042cf8ff8c87ba7064afd2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a Pdf.Phishing.Trojan. The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious content or facilitate further compromise.

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://crewmak.ru/uplcv?utm_term=10+business+days PDF link annotation
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef1f18663---jotakasipikog.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/wosivotatazaz.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/34841649035.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/82858957879.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609921e0638a3---5129211920.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/593isq1fqb0q6rsuoo1jgnegn5/nifipolipomuxekaz.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a224938b12d---jodamawazirajorudazuko.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/luwinejutamalaganatosuso.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/11480321465.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/37804943566.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8871d2dd2---wafipozolodige.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc303cdc04---bawig.pdfIn PDF document text
    • https://bselink.com/userfiles/file/didutoberidotaxowem.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/rdcb2u3l9uvm726s5dl1lb8dvv/96557465818.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/16264667472.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/susujevekodomuramabudig.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/b2db08095d37c9b6be618bb25050f768/mesisalesu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d2f80e91a---tenobevezasenosojaxakame.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/47840258522.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0765736193fdd8de8ff516093d7d37ab/tesotetekenixigon.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/38078112545.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210610190153921081333.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/werewosapunokakenapor.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B3 16716 bytes
SHA-256: 396eb93594c80c3307dc49b6becee2c4010a81446c97f945be452f365d901497
font_02_sfnt_off00013dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFD 10308 bytes
SHA-256: 3331352dae8914089e0eb9f262f51c8d40c3ad434f6dda3187b15ba9074f1bb2

Open this report in the interactive analyzer, or submit your own file for analysis.