Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0e1f212e4b939c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-13 21:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bbd9e3e83cf40a73ad15bb6964f7c25d SHA-1: 8ac195b533e99704620a443807d46ccb08937196 SHA-256: 1e0e1f212e4b939ccb97f90685a72417f01fed93ab0bc26ea5b924dbeedb1715
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 disposable domains and are structured as a link farm, a common tactic for distributing malicious content or conducting phishing. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xutricolor.com/uploadfile/files/nanugegup.pdf In PDF document text
    • https://everestart.com/images/stories/file/gezawud.pdfIn PDF document text
    • https://betsin.org/userfiles/files/gifojamavarapudawurazeba.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/39493641760.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pozopenesovomiminumuma.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/papev.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/fezubonofevawibexe.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/kelasunubuxiturosovajibat.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/22431521878.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/53711688595.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/27483103307.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/bobonowom.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/83108639500.pdfIn PDF document text
    • http://elsped.hu/files/file/34867825222.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/sogajapepi.pdfIn PDF document text
    • http://vecsecity.info/editor_up/zisonuwowoba.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/2abcd36293077a2ee827b31cf4359efa/jezuzunudop.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/nuwogis.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/47040687959.pdfIn PDF document text
    • http://dezis.ru/uploads/files/nisaworisutatanid.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/14416782659.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/51401763613.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/31154786052.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/tezetuxabiluguj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=android+native+app+development+languagePDF 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_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 10712 bytes
SHA-256: deb1f40d1983ac5ba5d81216f5f24b8e027cb18c8df4d6c448d2b4c766989b71
font_01_sfnt_off0000e70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70A 17876 bytes
SHA-256: 4f1f65f6833b858f124456e7c79623c9428ca64db564ce1a6e32a4fc3ec77f5d
font_02_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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