Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28692e59b0961b0…

MALICIOUS

PDF

75.4 KB Created: 2021-09-27 01:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf67de8fffa270f0e291568a20716cc7 SHA-1: acc49087ae33b0c66719a098aa6f8077f2f63625 SHA-256: e28692e59b0961b071225f7ecad88c8c65c5041bde5b5bdfd8d239eae29ac1db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms and phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely a phishing page or a downloader.

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 https://coretry.ru/uplcv?utm_term=confessions+of+a+teenage+drama+queen+full+movie+download PDF link annotation
    • http://c-amc.com/upload/files/sonagivaxuvoxa.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/xutebufuxoxabutudavibukuv.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/piwerasif.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/95404648829.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/bupamifewuvobumafa.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/53646448567.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210913065257175.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/mapazezadipelote.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/xevaguxuzolaruniwaj.pdfIn PDF document text
    • http://www.pvvc.cz/files/nukazerelefib.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/eoa3tu1b4u2eimfaav6ia77996/kebukajisawo.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210910_110436.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/votelawasa.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/34021998277.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161470778954c9---74812830217.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/58053900541.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/dabojimuwawi.pdfIn PDF document text
    • http://inphilong.com/upload/files/95561033191.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/43836962319.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/lamadotewusadijozo.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/93663982378.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/zirojiwemezos.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_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 18384 bytes
SHA-256: f41a020be9bc4c99ca0546038fe52eb2a171e086177febaf2f925e567828085a
font_01_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 11128 bytes
SHA-256: e89fb8f9c7435a1c076d79d451edb7e25d8265e1ba6286d288f53555fb94098e

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