Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb03f1e8df5a64b…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 04:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9780cd8c6f64cba5209fb367ded4f74a SHA-1: 3516ffcdbd6853db7da2852269436d936c688ed6 SHA-256: 7cb03f1e8df5a64b02e5105853ec3c049150657997443f9017438e64e9ddec71
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=apush+short+answer+questions+examples PDF link annotation
    • https://kisimerib.weebly.com/uploads/1/3/4/6/134697331/bb803662b7.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/mavaxitipaj.pdfIn PDF document text
    • http://wofoweniwer.iblogger.org/normal_pressure_hydrocephalus_treatment_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/2Pid6gf/stick_shadow_war_fight_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/jhcMSjc/77360514514.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/hi2xVYK/support_synonym_thesaurus.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/lixisariwulo/how_to_fix_a_sewing_machine_bobbin_case.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/nutritional_information_peanuts_dry_roasted.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/enchanted_taylor_swift_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/33735135451.pdfIn PDF document text
    • http://tejutavufoxif.epizy.com/peveborifobimube.pdfIn PDF document text
    • http://vutupaxuvidebif.rf.gd/what_is_your_definition_of_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/better_than_before_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/diverticulitis_antibiotics_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/flashlight_pitch_perfect_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/7850078342.pdfIn PDF document text
    • http://taguminuligifis.rf.gd/esl_family_tree_template.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_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 5336 bytes
SHA-256: 44e42e20f6ed0ce31da430caa501535b99325ea29f05533d896c0ae758c30f37
font_01_sfnt_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 10380 bytes
SHA-256: 22cedc681673eddc0f43974a9d7d0f0ea238415361254d95929d74e88da9d4e5

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