Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fbfe2a97e305af…

MALICIOUS

PDF

86.3 KB Created: 2021-09-09 23:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4692163af6691a4768252c75ba970925 SHA-1: 48cf00a5d50e835ba15c5ad89ab777d76313c9cf SHA-256: 60fbfe2a97e305aff9594721099981fa4cdb27e4f279d17fe4bc0b3c3b97d795
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF_URI_IP_LITERAL heuristic indicates a direct IP address link, which is highly suspicious. While no scripts were explicitly extracted, the nature of the embedded links and the heuristics strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://elcolono.net/userfiles/files/wavukafujiguvegumeliputok.pdf In PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/gafosuwot.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/52435702227.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/45363416501.pdfIn PDF document text
    • http://safarang.com/basefile/files/27402932242.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/purufoberu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317ead07b78---9148674325.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/zuxotunitepefeg.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/wovelerumarofala.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/jatag.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374950ced06---52495427122.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/91381986541.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f481792438---gemulipurukivokija.pdfPDF link annotation
    • http://www.morrisjones.co.uk/EditorImages/file/jajide.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210909110545.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/74759129759.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/89004460865.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/puluxajobuwume.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/79789328544.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210909110352.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/nivewebav.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/51900032.pdfIn PDF document text
    • http://jn-zhsc.com/upload/13362212134.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/lajukijara.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/86967705798.pdfIn PDF document text
    • https://hoavily.com/uploads/files/27014513957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=games+battle+royale+androidPDF 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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 16796 bytes
SHA-256: 6b5b5163c9c976969172bba071b08d3556aee065a6b3a68ed715e25cf17c00f6
font_01_sfnt_off00011aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA4 10704 bytes
SHA-256: ab8f5f3eba9e0814a5aa4d7f1e2c0d028ca426891a2485652f2c2dbb3c839be8
font_02_sfnt_off0001333b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1