Malicious PDF — malware analysis report

Static analysis result for SHA-256 5523163e7b4f85b4…

MALICIOUS

PDF

43.8 KB Created: 2020-10-26 23:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fe1996d139fb212cfd673a4552dc54d2 SHA-1: 66709196c58609b27082e31888fbfcb4b950e491 SHA-256: 5523163e7b4f85b46b2054dac709d24c9dd015c72507499a8283f96598258753
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/pify?keyword=juegos+de+animator+vs+animation+game+hacked In PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/wetoviwebotuzo.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/6263159.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/3519087.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/rovepu_danod_muburukupe.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/6034297.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/nareselij.pdfIn PDF document text
    • https://zexenokupilifuw.weebly.com/uploads/1/3/4/3/134375928/pozazoma_mojagugabaz_detuduri.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/b1304104fa21f.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/zigovok.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/53a2f80484d7a1.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/91da0.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/3076176.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a5d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a5d.bin)
    • https://s3.amazonaws.com/zetare/lukude.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/ordering_fractions_and_decimals_from_least_to_greatest_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/ascaridiase_fisiopatologia.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/73712246754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe1c856-fa0f-46a5-b9b3-cba2cfb02556/6793791373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059eadbe-ff8d-4b8b-8dad-592ac13fa066/34758202628.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/barycenter_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/application_for_child_care_leave_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/nifaboteropekixepi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/36021479279.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/99978261319.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 extracted file (font_00_sfnt_off00006a5d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5D 5436 bytes
SHA-256: 06d3f3e8f4355a7d1d05bdff77d113abf778ff47b0eb4545ec986ef76e17b34e
font_01_sfnt_off00007cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 10868 bytes
SHA-256: 50b56047a237c1bc43d5b7375e91cda1503de919eb67b2c55ada579aeebccbd9