Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c4268cf678f3ed…

MALICIOUS

PDF

73.8 KB Created: 2021-09-20 07:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 56eca65ff730d87a3e4d8d7c504dbbc5 SHA-1: d642d562b9c10a72ab1618ef603e71410f6ecfd4 SHA-256: d9c4268cf678f3ed78df563e968ca63056dafe8d5edec300cee1debfa1dcad25
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs pointing to a link farm hosted on disposable domains, indicating a likely phishing or scam attempt. The presence of multiple distinct domains and the use of 'utm_term' parameters suggest an effort to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/17170942395.pdf In PDF document text
    • http://frangarcia.eu/upload/file/91168477380.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sodilekilorevetesitukefe.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/fuzikujed.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edefe6e343---wodotikalofizaparugadut.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/66310590760.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/12000304376.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/duxekobi.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210917_DF9BCD4DA9D4CDEF.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/vafomekofag.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/kabixezilulazefi.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/8330263948.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/zajadokosora.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/55170756578.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/61871074674.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/duzoroxu.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/31745153048.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/23049416554.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/12005463001.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/24202223606.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/tokoderedamudasa.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/90786397641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kumkum+bhagya+8th+july+2021+full+episodePDF 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_off0000ba8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8C 11808 bytes
SHA-256: e46dd91fb2817ce417617db5c540f63d80dbeeb787c429a681a1f6f0f34cb8f1
font_01_sfnt_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 16864 bytes
SHA-256: 53a529e68d0fdf2d42851bc7388470312234227ba1be37de78a34b98dae4ae74
font_02_sfnt_off000101b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1