Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a01e04adef7a9f6…

MALICIOUS

PDF

68.3 KB Created: 2021-09-28 15:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a48e6037b9a45024fd96e155a6f3d464 SHA-1: 01d62f5542cafc7ae7d181e173b08fdccf09645c SHA-256: 2a01e04adef7a9f68de0443145499d4a902cc277475647fc949ee3cd8835c63d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot disguised as a document. It contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 1 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 http://tongdingjixie.com/d/files/19939246159.pdf In PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/badotawexajupibomawa.pdfIn PDF document text
    • http://airfa.it/userfiles/file/vabet.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/16283190742.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/ramorin.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/74294053167.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/sijiwikededepepesup.pdfIn PDF document text
    • http://machulski.com/public/file/19419826815.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/2887373059.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/9787799708.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/33198954570.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/82827450557.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/28876887257.pdfIn PDF document text
    • https://mentormedya.com/files/83220109822.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/sirukobefodadunimog.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/puvivonoras.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/889fec8f8aed2cc0133205e6b4222962/fuzaxutegegenon.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/xajadukenivogumarusitoxe.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/21448367172.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/31362399517.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f423071c61---lobofosanezimil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=shaapit+movie+download+720p+blurayPDF 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_off0000ab52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB52 14400 bytes
SHA-256: 1ef44dbc5d24e272b5d97574b4baadfc3250b54665b16bfea7f993b1afe91994
font_01_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 11360 bytes
SHA-256: c846e68a7ac3f21c2eef69ae80b1a605189b086808ce1656ca329a0aed00325e
font_02_sfnt_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1