Malicious PDF — malware analysis report

Static analysis result for SHA-256 536f078d65f2472d…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 04:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a39e04ecc94b539bda8c487092fc2cd3 SHA-1: ce831d0be79462a8dd6713465f1b9fa97a3c207a SHA-256: 536f078d65f2472d39bea772f6d28119ee0e4a3782926643d8ca687058a5764c
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://baarspo.ru/aws?utm_term=how+to+make+healthy+smoothies+to+lose+weight PDF link annotation
    • http://daduriwikoniza.22web.org/standard_consulting_contract_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/1DVNjcU/albatros_aircraft_world_war_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/jgcgcQo/voicethread_tutorial_teaching.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5ff2fba74462b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fe70f91df3da.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/SeiduNE/werabimunotozawudor.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/1d3dd6ddbdba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_60329b5518ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/ghhvQCi/meaning_behind_bad_day_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ff784e8ea4a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fca718cda01b.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/igcidEX/jorakebosewofupi.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jbVowge/ceftriaxone_antibiotic_injection.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mexorilurolepap.rf.gd/jalaligumerakudigoli.pdfIn PDF document text
    • http://tezitap.rf.gd/judolijoxunuzefopedigup.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_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 5220 bytes
SHA-256: 0a915fd15a0fb78daa3575aff373e69f5953421b47f1e3d6ea52bb54614ee027
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 11160 bytes
SHA-256: 09f2837063a8846cd879e3757366654ea6a803756472e45188bb64561e58033e