Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce826f8b49eb62e…

MALICIOUS

PDF

72.7 KB Created: 2021-09-23 20:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b7ae9b54bb61f95de4e8f2ff89a8c03a SHA-1: f83e5e9eb1edf06f99c8a04522793041c46cdec5 SHA-256: fce826f8b49eb62e9383e36884eb556cace51f45f7712ea023cf8d7e27e37195
126 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 embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to obscure the final destination, likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491f0c65061---43242065148.pdf In PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/77462309286.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xuwabofuzuvatezenig.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/26410630404.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///pezetuzizurejazome.pdfIn PDF document text
    • http://erpos.sk/data/files/74447890639.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/dexepuperuratom.pdfIn PDF document text
    • https://ibericadearmerias.com/file/47722249772.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/48320993785.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/74901301471.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/9076265107.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/wabemoretisadugorigobigev.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1631567405zuzepamapuliz.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/wuweraselewifugifexeteru.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/ruvuburatogapejobopi.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/31452373173.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/ralupuvipoxanikadusus.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/13442942037.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/96506034435.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/xuzonubom.pdfIn PDF document text
    • http://spakimthi.com/upload/files/jafajonuwabeseledave.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/fowovezofoxafakunizajig.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210921044146_zejrhv.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/44608643438.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85360734205.pdfIn PDF document text
    • http://unsersohn.ch/images/file/85918699541.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/vifejitazimoloxavoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=gujarati+lok+sahitya+book+pdfPDF 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_off0000b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81C 16988 bytes
SHA-256: a58935ce7eae6fcd915924c77e9f5aab6692849b3f9b4c3fdc298e5d5b4112a0
font_01_sfnt_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 10972 bytes
SHA-256: 58e3690a0d4dafe30708837c2508985426a509ec48d4d64f63a314c99cb47dd3
font_02_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1