Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12cc85e04ae0d1e…

MALICIOUS

PDF

67.6 KB Created: 2021-02-27 11:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: abc3597e2832896e0220192ebe1430a3 SHA-1: d4da6741f2c173ca039bb9d9cc3b7fe1f810cd62 SHA-256: f12cc85e04ae0d1e883a9ab890b0459a18581bcade352f8bd1d29100b5856d3e
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://bologen.ru/award?keyword=what+size+is+a+kenmore+500+washer PDF link annotation
    • https://cdn.sqhk.co/mojuzizimu/gdalydi/outdoor_table_tennis_3d_model.pdfIn PDF document text
    • http://lavka-karamel.ru/42711632226cf2fm.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/viziramu.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/2294351.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/tubogujexebe_mokol_gufafuzawu_dejuj.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/wumodukubaru/dstv_tv_guide_supersport_schedule.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/sigifutoviwejerovabez.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/factors_affecting_drug_bioavailability.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/yugioh_duel_links_starter_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/where_did_the_saying_skin_of_my_teeth_originate.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/tweakbox_app_android_apk.pdfIn PDF document text
    • http://muvusibose.rf.gd/bajadedubovugesoguvo.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_off0000cc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 5380 bytes
SHA-256: 4405a9ca6f5b4c8e71259d2138af1692d263221b01e2cda59544c1d8bcc624b5
font_01_sfnt_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 10284 bytes
SHA-256: a487c2b0bd120253f7337ea9e6d9a04e912f3760d12f78be72ac74637a37f62c