Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7906ad01f80cb1f…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 16:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: afadcedae610fdc5550c437326df31b2 SHA-1: f601371b69511613dbd375b729ffb32733030a80 SHA-256: b7906ad01f80cb1f3ae444e3cdb4fa5c3e6ddafdfba6031b1d51b56abc082407
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1534 Unsubstituted Attack

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication, consistent with phishing tactics. The presence of external URIs suggests the document's primary purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://wastran.ru/uplcv?utm_term=gangstar+crime+city+mod+apk PDF link annotation
    • http://incomingmakedonia.com/files/files/napegutikalefuv.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/wevege.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/9982010788.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/zolofizimiranaxunofuw.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/zakelogukenasafidumi.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/76620002108.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/lutinuxolosoniv.pdfIn PDF document text
    • https://nexapos.com/upload/files/47169401617.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/furufatasur.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/64559899737.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e07e647a1e---81503941013.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/wanozurakezimonopu.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/44185320337.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/25249452527.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/musobavadaned.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/rumabekisapelelesikol.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/kegatobewozugasab.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/98347191662.pdfIn PDF document text
    • https://drgcode.managenet.ro/images/file/bupisomi.pdfIn PDF document text
    • http://sentai.cc/data/file/20210909_120531_720.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/xiriwapum.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/43913485707.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/98715286434.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/tosarasakazanisanonope.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/rirud.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/90107753691.pdfIn PDF document text
    • 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_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 18520 bytes
SHA-256: 1f7fe6a18f96a21b00c2bf3831ed3ff32fad57269f21c5a542ffa606e9c72bb8
font_02_sfnt_off00012331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 11056 bytes
SHA-256: 7a7ae128bb240b6c3c1fa3394f89099528233d8af97be642a1a3514320ff47ca