Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8affce22f8e3fc7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-15 15:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5ce82ae479c136bfd86c081a341735ce SHA-1: b9f768d91729dfb6481b88d337a0dd7f0fa5711e SHA-256: a8affce22f8e3fc715b6d14fe9b7c8bf6593a9d11e8d57549899f06f8d0365da
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://baarspo.ru/aws?utm_term=what+is+the+mediterranean+diet+consist+of PDF link annotation
    • http://firstsecu-paypal.com/nooru_varusham_video_song_downloadrm2lo.pdfIn PDF document text
    • http://babobekoru.66ghz.com/spelling_rules_for_ssc.pdfIn PDF document text
    • http://hurleyshamburgers.com/batuzy78sv.pdfIn PDF document text
    • http://rotixumuzu.22web.org/towajedisiro.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/9972245.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/regegozumekoza/android_calendar_icon_shows_wrong_date.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/pakesevesanivisotidaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/irs_w_4_personal_allowance_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/16641940714.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/chutkule_image_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/dslr_camera_free_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/anglo_concertina_music_sheet.pdfIn PDF document text
    • http://nolepukopele.epizy.com/57840458760.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/ragixegot.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/runukuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/ammonium_formate_pka.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/38617911243.pdfIn PDF document text
    • http://kitalanexu.epizy.com/violin_sheet_music_easy.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_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 5244 bytes
SHA-256: 10a967a46e8c38edc43ef81d05eafb8c308a7d9c2a5c31ae094b6871e55ae728
font_01_sfnt_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 10380 bytes
SHA-256: aca19871db5551415cfac4a478788d5daa6cc6446802f0a515bfadc936f4aef7

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