Malicious PDF — malware analysis report

Static analysis result for SHA-256 c478d47eb15692ff…

MALICIOUS

PDF

73.1 KB Created: 2021-02-22 13:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5502796b6d9a2a87492d21d3f69cbfd SHA-1: 3fe43ac8ff8da9e7db7207c8ad67dfeacf673c9d SHA-256: c478d47eb15692ffd07f39631768b579c6e659c80d2f0f96c22c8ca2d9ca15e0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=molarity+and+molality+practice+problems+worksheet+answers PDF link annotation
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/5168000.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/bac9592c97.pdfIn PDF document text
    • http://xajoraxi.22web.org/avg_antivirus_pro_cracked_apk_2018.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/nopalotusu_bujunujidu_jimutalerizaluw_retanetokoz.pdfIn PDF document text
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/vizoradamu_kigawonolikun_xaket_durobis.pdfIn PDF document text
    • https://wutaleba.weebly.com/uploads/1/3/5/3/135390467/d6bf974.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/9588770.pdfIn PDF document text
    • https://tinulesuse.weebly.com/uploads/1/3/4/6/134689832/welodamuroretu-gatetimiwefu-xufufibonis-ridugasepo.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/bipig.pdfIn PDF document text
    • https://betetitowuti.weebly.com/uploads/1/3/4/3/134331261/kazug-biwid-ravavubepirasi-divas.pdfIn PDF document text
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/1319667.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/novifamigot/what_is_meant_by_pax_romana_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/free_linux_slackware_iso.pdfIn PDF document text
    • http://xaxefoz.epizy.com/kudilapamakirumiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/rock_around_the_rock_cycle_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/arc_length_and_sector_area_homework_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/rsgb_candidate_application_form.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_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 5716 bytes
SHA-256: 39fa64871cde03702a0980ddaa6f54ca49424260917f52bc38b67bc6b2124377
font_01_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 10556 bytes
SHA-256: ea9e74964a1d45595920f17e29d54aa0762c07a03bbe2f113e81716cdbc73482