Malicious PDF — malware analysis report

Static analysis result for SHA-256 13385050493bab99…

MALICIOUS

PDF

75.7 KB Created: 2021-04-23 02:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d3162f5b69bfee6c25dd02036397f352 SHA-1: deb7e5aad364282cdfc90db83919116846932133 SHA-256: 13385050493bab994c4c1ea8a389b97d945e585dbdc5cac6a5ab4da43a3a79d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying a link farm. The primary external URI points to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://xezojetit.ru/strik?utm_term=free+printable+guided+imagery+scripts PDF link annotation
    • http://fullhp.info/38320891365td7ae.pdfIn PDF document text
    • http://smirnoff-optic.com/62589391703rlzwp.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/IggRhhu/xigusafewebazarimitewi.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/hhIje8x/filowinizofija.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/k0ztHig/vegas_national_park_road_trip.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/0Wy0jbk/12269538136.pdfIn PDF document text
    • http://ogranicbio.space/fufazoraxedenujam7mmem.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/rozebofukixus/email_extractor_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/gunol.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/74076699545.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/linigurisusubogosij.pdfIn PDF document text
    • http://zejowupifodoj.rf.gd/chacha_chaudhary_sabu.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/algebra_2_regents_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/how_to_install_minn_kota_trolling_motor.pdfIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_825facde6b2643dd9a4d4404b17c9ab3.pdf?index=trueIn PDF document text
    • http://bededojobafepeb.rf.gd/how_to_log_into_my_cloud_dashboard.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_25d162bcfb104a6c8527f3d02af041ae.pdf?index=trueIn PDF document text
    • http://delanuzapuz.rf.gd/pazovojogam.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_b4e2a2fb56a8481ea2c2b652476d6f18.pdf?index=trueIn 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_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 5588 bytes
SHA-256: c6c6b4ed00d10696cd48e38bdd559ecf211643f0870cbb88bbaad57882ea95d6
font_01_sfnt_off0000fcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCE 10836 bytes
SHA-256: 953f71ab189039634fb4b98bacf9c81a9fe9f4d5927ea146deac46ec0952f984

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