Malicious PDF — malware analysis report

Static analysis result for SHA-256 420307e1b8dbdf41…

MALICIOUS

PDF

71.0 KB Created: 2021-02-24 21:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 52bdaa082a623d2071fef05ab705ab81 SHA-1: 35818885ed1bc9b9b4b83060e2d1b33433d930cc SHA-256: 420307e1b8dbdf41ae6cd605e52303588e0ab4c84fb68e4cfe017f718be1d550
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://maypoin.ru/wix?keyword=chapter+6+the+periodic+table+answer+key+pearson+education PDF link annotation
    • http://nigavereke.mygamesonline.org/mubuxemapejezaxita.pdfIn PDF document text
    • https://ragenakesigufu.weebly.com/uploads/1/3/2/7/132740294/3767427.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/setting_citizen_blue_angels_watch.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/82138085653.pdfIn PDF document text
    • https://zolowokixo.weebly.com/uploads/1/3/0/7/130738875/nuwigazew.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/52872192277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/new_themes_for_powerpoint_2013_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/raroxexilalozi.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/compact_showtime_rotisserie_and_bbq_oven_accessories.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/57303328227.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/75453469294.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/vocabulary_workshop_level_d_unit_6_antonyms_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/80054611242.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/xufowujadinutalos.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/paxewuriwedewoxuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 5620 bytes
SHA-256: dd0b9949c609986b33fa8c64b560548934b4e72fd18dcd982a6d6ed734cb1ba8
font_01_sfnt_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 9936 bytes
SHA-256: a49c3c30ab2fcf61f90ab4a26069d2941c8e7afc0d720f7e74441585ef90f121
font_02_sfnt_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f