Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b81c768f49e470e…

MALICIOUS

PDF

86.2 KB Created: 2021-06-29 22:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d70cd83029d8209d8bacab26714123fe SHA-1: 11c7f776460adbd0e3b87ed3d5ff45e4e683dddf SHA-256: 7b81c768f49e470e3d2c08a61d4a7e774447db491e04ce1395177383d86b41cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and points to compromised WordPress upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://ketchas.ru/uplcv?utm_term=father+of+lights+bible PDF link annotation
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3dce1449be2256c08c1e1f3118deed15/67721086037.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iep1pqh7bsvmg22djvb35tjcj2/62762900517.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160865f5ddcfa2---14531778600.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/955a60cd762b2c5751f051ccd0119ad9/31939519248.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac729e93eae---92938521853.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/bt899h33pv5n6q70klkpocbk2h/wawiva.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/jemajazufutasem.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072da34cd519---22003580250.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/8m4te0cn5262t0ii2g4rb0erun/nuniforipidopi.pdfIn PDF document text
    • https://dock-levellers.com/upload/files/zegifenegetunajawodovexem.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/44135690041.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f1d9cff58d30fbd4aef780e38225b87b/69520035384.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/98fdc5b9b192c82f792b9f4bddc86410/wimudululavatusanalam.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/593d6d7a516b5812715bcb12c29039d2/wopezexakaxubupowul.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4be9ceb03d---fukunozofezagig.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/34127408379.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/zukazekukok.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/82430975127.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0641285d---davek.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be60896be---45986549578.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b086d3336---849875821.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c894a6ac33---20779544634.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f28e3cab0---40121743391.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbb3e1a05---xesidulabokugedar.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6098289cc57f25a8502e9c64120f5f07/41495747733.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/55368414475.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_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 10504 bytes
SHA-256: c1836c69393d5ad07801df1e7b39e169e4f624fb18e20b8cc7fc57a73073be45
font_02_sfnt_off00011d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D16 17460 bytes
SHA-256: 4365de71bddc90cc5a4b8633f9e25c43396404ecb89ffd35fdc440b963e1a11e

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