Malicious PDF — malware analysis report

Static analysis result for SHA-256 138d16e55916e8b2…

MALICIOUS

PDF

68.8 KB Created: 2021-02-11 22:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1d2839ba0c781c20fb4a266aee83a600 SHA-1: 77e7e2463d14c8091ddbaa4a42eda0094b747c98 SHA-256: 138d16e55916e8b2f6c67a7be9c9053f71e68500ada1728416dbd77cafbea42e
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=wire+tracker+harbor+freight In PDF document text
    • https://cdn.sqhk.co/kajurineg/ckicQji/98341473640.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413567/normal_60072bc1d8e47.pdfIn PDF document text
    • http://osthondroz.com/free_template_covering_letter_for_cvb6anj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_60048263f2a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60109f4164904.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/CoKihSi/20827228774.pdfIn PDF document text
    • http://xexogafuko.22web.org/daily_mirror_crossword_puzzle_answers_for_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_6024ce6018442.pdfIn PDF document text
    • http://iwhite.space/every_patient_tells_a_storyi2n6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444358/normal_5ff56bc583bc5.pdfIn PDF document text
    • http://copyrighthelp.info/jotunovadezory9x19.pdfIn PDF document text
    • http://tipatav.22web.org/dilapidation_survey_template_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5ffb23013a75f.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/jfBhfhi/61523555571.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/tarizirefevifab/matux.pdfIn PDF document text
    • http://lenawevurokolup.epizy.com/betternet_apk_para_iphone.pdfIn PDF document text
    • http://rowesotinik.rf.gd/canadian_election_2019_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/char_griller_smoker_manual.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_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 5152 bytes
SHA-256: 6701974efb51b2e81fc126e5380f7e7e36394f0d4a8a5d70204c65c5158500bf
font_01_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 10212 bytes
SHA-256: d111e3e679d4365b60e7fc381d7d2cb5b57dea9b0a9085166d5273f3d019b3ac

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