Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f7eb7efc03d4ce…

MALICIOUS

PDF

99.3 KB Created: 2021-08-07 23:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca8d3770ec59ad1f030e88e46bffdf20 SHA-1: fedb4017fba1061ba4be7fe4105cde335790c298 SHA-256: 76f7eb7efc03d4ce7929b3a56bb6dbed4f9f72129222b463d33cfdf1dfdf5a3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farm heuristics indicates an attempt to redirect the user to malicious content hosted on compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://slhs1958.com/clients/18590/File/2248184226.pdf In PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/bikeselugurimiw.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/86817985060.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/54781381656.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/gusofejipigob.pdfIn PDF document text
    • https://cooperspick.com/files/bisarepaguna.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/25296710254.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e965d9ef6---liledewetajuzuwe.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9db68a54---58592514451.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7665346fa---22640125415.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/sizop.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a23c4bac7920e6b7e4160b2027e3660a/72938873831.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9652be4cc---zunagasu.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160f35168b3ce6---96014091705.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/hn8fjp6spbqqegscspm0mtqbqq/tewuxezederas.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076acbf9d1e4---29953880565.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/jepikogorozer.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/5o7jprjgel2657sqrgsvopnfh1/gijulixewidofidazivi.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/pipavidexalajozawaviz.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607decb50e17f---xevetulazedala.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/wapuzonunalibox.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/ruloxokukarajaz.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/budijalarar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=nigeria+defence+academy+2021+form+outPDF link annotation
    • 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_off00011d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13553 17432 bytes
SHA-256: 350caa7f8a7802968c5fe1c833b4dbe6fa64aec15ad47d479b6d8d7ad12fa6ff
font_02_sfnt_off0001631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1631B 11092 bytes
SHA-256: f71452dbda6159e049b995b4e78b2137205d7fbffae756f044ee42f548ff2fb7

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