Malicious PDF — malware analysis report

Static analysis result for SHA-256 2931a67549315431…

MALICIOUS

PDF

70.7 KB Created: 2021-02-28 17:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b13efabccba659585176b5b1cd57f7dd SHA-1: 936f0e1ec02b147ebe310071b8dd909fb1d18ebd SHA-256: 2931a675493154310137531c7395e271e1611537770083a40b6ee0e906ed81f0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/wix?keyword=android+studio+unpack+apk PDF link annotation
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/birukujuw_batonuwokoxi_mositibitu.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/5aeb52e.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/tiradenozitubateviba.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/cirrus_logic_annual_report_2017.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/fepixomesurigaf.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/608930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/rap_albums_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/13874823364.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/62167807798.pdfIn PDF document text
    • http://fufezexu.epizy.com/gesezinegogilobekadumox.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/diferencias_entre_anestesia_epidural_y_raquidea.pdfIn PDF document text
    • http://fitunugiwa.rf.gd/15014790909.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/mejosenugudadisilejokuko.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/modern_cv_resume_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/company_of_heroes_2_ardennes_assault_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5088 bytes
SHA-256: 3c5cb50b53a3661b2cec049efea6a77c04a226ba8a8a85e1f144d218fb92e75a
font_01_sfnt_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 10192 bytes
SHA-256: 52b11fb4fb2be3bcf5468b6d60b155644d17fe9850d3d74f4b9b7a4298911e41