Malicious PDF — malware analysis report

Static analysis result for SHA-256 d991be93df744dac…

MALICIOUS

PDF

61.6 KB Created: 2021-02-21 11:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 80dfcc56a5f81d8db4273cc739585cc4 SHA-1: 2d49bdfef468f3aa655b8b5ac1a5d9dae02f1e03 SHA-256: d991be93df744dac3fb3d5665fe0217962f6b2250d62858b65396411878a8888
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://druttle.ru/wix?keyword=fast+times+at+ridgemont+high+shirt PDF link annotation
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/1080394.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/realtor_magazine_franchise_report.pdfIn PDF document text
    • http://gawoxubut.22web.org/monkston_primary_school_milton_keynes_ofsted_report.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/7676284.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hfmjajh/thronebreaker_she_troll_fury.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/gOhhadC/1559326742.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/irbwjaL/tinuzugexeda.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/gumagabu/blackberry_os_7_themes.pdfIn PDF document text
    • http://molojagevatabu.rf.gd/37495095420.pdfIn PDF document text
    • http://juvujiliso.epizy.com/5521288146.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/programming_language_for_android_software.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/archive._org_games.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/49506600931.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/handbook_of_automotive_sensors_and_actuators.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/knowing_god_personally_booklet.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/yoruba_bible_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/75861050288.pdfIn PDF document text
    • http://xazogugikuriwox.rf.gd/cadillac_ats_2._0t_manual_review.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_off0000b5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D4 5160 bytes
SHA-256: b906deb8d1ebba9b2e6346bb45043dfff8371ca621109deaa61b2b4a32d6faab
font_01_sfnt_off0000c734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC734 10040 bytes
SHA-256: 4a71c2444254bd6c7fdedbd08980483076c1809083b9d17684203992aa56193e

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