Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aecd07542fd652…

MALICIOUS

PDF

68.8 KB Created: 2021-09-12 08:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4bdc0ed7ab486075e2b802ac9f372079 SHA-1: 598f40748f5a05805b84b60bea0b225ea01649e4 SHA-256: e7aecd07542fd652c1e3dfae7e908fa39cfe10411d3663bf38e2a36e48114b1e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document with an action trigger, typical of a phishing lure. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=enterprise+oil+and+gas+jobs PDF link annotation
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/81112142641.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/3507373617.pdfIn PDF document text
    • http://bjjiffy.com/upload/zewukem.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/80519660948.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/46922897081.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/70094862366.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/pitezokaxubunetudexajefe.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/fobipe.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/limawirexoruwomewuriwiro.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210904160811_991604190.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/pegerejetitabufe.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090108521673499.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/1425520968.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0875f1988b9c8e6355187a19ca024715/36253598663.pdfIn PDF document text
    • https://motoralbini.it/files/file/sagapulas.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/94541555060.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/finisojarafoxawakuzi.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/66051035451.pdfIn PDF document text
    • http://whatdwellswithin.com/file/36850195363.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/45968714339.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/duxudo.pdfIn PDF document text
    • http://potya.com/10857346947.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/nofodusupubagubukixaparo.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_off0000b27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27E 14084 bytes
SHA-256: 961d7d56206313f1ae5b8d1442305f24443eeed44b9e090272e7a0076ba8a719
font_01_sfnt_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 10820 bytes
SHA-256: 480d0c51000bc4f4c042bb61c7318f44d23a123f097a29f845574399c0e38ce9
font_02_sfnt_off0000ed98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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