Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61b0dfa81beea29…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 15:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3ac1c7a5f518330c1dc1cdafaacf5e35 SHA-1: 9822239231dd840663c4f6355ae87883e7a90efa SHA-256: a61b0dfa81beea296a6dc94381a69eb46c973c0482f424b2e6c2864b9317b98c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=how%20much%20does%20a%2050%20inch%20tv%20cost%20at%20walmart PDF link annotation
    • http://losewunisa.22web.org/vocabulary_workshop_level_d_unit_5_synonyms_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6019f1633524d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fc8706e1f79b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_5ff4b6c1d29bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414176/normal_5ff9ab6793a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5fe90c01e4305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ffed0bc2676a.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/11748983750.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/uc_riverside_sat_scores_2019.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/vanilla_wow_alliance_leveling_guide_20-_30.pdfIn PDF document text
    • http://lalashoppen.online/fakunejelenabizazuzeziuupu.pdfIn PDF document text
    • http://koteyarn.moscow/kalnirnay_2020_marathi_calendar_download_for_pcmy4dt.pdfIn PDF document text
    • http://tehnotop.space/spirit_of_the_laws_book_7_summarysfyw0.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/94949226117.pdfIn PDF document text
    • http://vas-rem.ru/kutile0n9rc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 5560 bytes
SHA-256: da3842f45b04a6c7fffb597997d62e389cb4c6ab5300b4e1338ad75fc4e4df71
font_01_sfnt_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 11124 bytes
SHA-256: 0fd50b82abc751c43fe4fdd48b12eedefaa35c3f0ab9e4a825713df44ae2fd9e