Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5b84d1ebd2d63c…

MALICIOUS

PDF

68.2 KB Created: 2021-01-29 03:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 91728df946dbbd4c33c4afe06bca964c SHA-1: 35c79f661fddaa65745a4deb6a219d66139448dc SHA-256: aa5b84d1ebd2d63c0427bbb9936290daa3f3217a922163b16ad37844b315d748
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=automotive+maintenance+merit+badge+lesson+plan PDF link annotation
    • https://cdn.sqhk.co/kinibemazoz/MIXTOij/basir.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/wETgagf/31957146628.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ak7mjf9/adderall_tablets_20_mg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447915/normal_5fef44ed6e247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_6007b68218577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fe771cbdf7f6.pdfIn PDF document text
    • http://goshop32.site/49725086123d2pl4.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/Sgfjgmj/wumedilisekekexedarap.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/5xha6AX/sagopufigodunaxanu.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/dudurat/anydesk_free_software.pdfIn PDF document text
    • http://voderekop.rf.gd/sbi_personal_loan_application.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/conan_exiles_dregs_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/jutebexati.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/adobe_photoshop_cs3_tutorials_free.pdfIn PDF document text
    • http://mibesajaku.epizy.com/gastric_bypass_pre_op_diet.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_off0000cd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD45 5580 bytes
SHA-256: 85904042bbaffada718d02615764c832d8f1d4eec9fddb998bb03ae9519af791
font_01_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 10340 bytes
SHA-256: c860b68a16a96520bb1d8e0486fa5623ecc65030a5065fcf534abbfec74de55d