Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ff9195bbb5f62a…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 13:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d5e3030ef17367125f6d5ac4b4b6567e SHA-1: b8a283b85be9e990ebea1ca09e4beaebcab24073 SHA-256: 71ff9195bbb5f62a88bc624e3327dcf91a14680fcf0843a593b0406b101bdf67
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://jottigo.ru/wix?keyword=what+is+business+systems+analysis+and+design PDF link annotation
    • http://padojuputiki.iblogger.org/amines_and_amides_chemguide.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/gewizasidefe-jupukafafatiru-kemexewana-tinewuweku.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/dovow_xuwurimin_didajuwesa_tudorixilupik.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/zalizubelijalamol.pdfIn PDF document text
    • http://tuworiki.22web.org/78241521583.pdfIn PDF document text
    • https://tigoxugijiwubaz.weebly.com/uploads/1/3/4/3/134315710/4122319.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/loxetidomatafin.pdfIn PDF document text
    • http://ropiwijubasa.22web.org/acids_and_bases_worksheet_ap_chemistry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiguteduvuvuxa.rf.gd/custom_video_intro_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/naxewigefipob.pdfIn PDF document text
    • http://larafegarinev.epizy.com/71094430573.pdfIn PDF document text
    • http://rovikejovejoto.rf.gd/39195191688.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/rational_irrational_numbers_worksheet_answer_key.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/jexotavumolomafaput.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/fubemamivar.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/polystyrene_foam_sheets_bunnings.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_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 5396 bytes
SHA-256: 172b54a4ffb979a101e5950a693e7f394686d9032f464a14faf5bd876d3f38e8
font_01_sfnt_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 9972 bytes
SHA-256: d06888e3e7c99d19d6f911267a8e139b43bea7cf2a58f7d0149e365935057337

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