Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb737523320a881…

MALICIOUS

PDF

71.4 KB Created: 2021-09-13 21:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 580d8a9fd39d0bc81e3650f37a9187b5 SHA-1: 124ee05aae767001524238ede52726e7d7fae159 SHA-256: 7fb737523320a88122b40c96ef7b8c55c8d63e7ed34c9c2dc07216974e479453
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://stjconsulting.it/userfiles/files/kezixiwasejete.pdf In PDF document text
    • http://gaziogluenerji.com/images_upload/files/82763576242.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/46783700835.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/fusigimu.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/12138139980.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/gexov.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136176d4c8bd---16462141247.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/xuruzomob.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/fatowawigoxinetobame.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/69198578861.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/78407280293.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/gobixafawaxepivawep.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/47332614216.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/65965310020.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/48317977528.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/53539405058.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/jarafavepevek.pdfIn PDF document text
    • http://annabarons.com/files/files/78940761351.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/33507873448.pdfIn PDF document text
    • http://rts-3.ru/upload/files/34903623218.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/15799501852.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/49209652513.pdfIn PDF document text
    • https://grouptm2.com/contents/files/76118979946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=need+for+speed+apk+free+downloadPDF 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_off0000b556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB556 16860 bytes
SHA-256: 264307bac78b671ac4e1c58c341c2a342599eb487f37ac895b64a7becc713fe5
font_01_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 10456 bytes
SHA-256: 0d84655c6944e65a508285b8e6a03a9b9ddfc00d86e64ee859957d4cf5669b18
font_02_sfnt_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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