Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4413c94045b816c…

MALICIOUS

PDF

73.3 KB Created: 2021-02-20 03:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 31fa7d9d4e8c079fc86454b14fef70a3 SHA-1: 219617779b2a812f9b9bd7f641b729ba29756bd4 SHA-256: d4413c94045b816cdf989da2cd3a5fe76f07026593ee875590dbdeb78548913b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=mbo+folder+repair PDF link annotation
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/xuwapadopedito.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/jewORgj/pick_a_brick_wall.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/51cc0f3c354.pdfIn PDF document text
    • http://tojasojula.iblogger.org/manual_do_proprietario_cbx_250_twister_2008.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/bonagitedezal-xazasuvisiw-lozawipiki-bipogupunulo.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/makulexu_gibitep.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/vinivuxo/limping_child_guidelines_nice.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/6199431345.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/21484298874.pdfIn PDF document text
    • http://rinaditinimi.epizy.com/10uf_16v_electrolytic_capacitor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/spreadsheet_maker_in_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/58840984100.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/92846906720.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/unit_4_congruent_triangles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/12911478569.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_off0000e258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 5000 bytes
SHA-256: 66b02e540724e2ff455e61041ae991f34acddbee2aa657823cf8347874a16bf0
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 10988 bytes
SHA-256: af059f17dc207516a6fbab32ca42decfdfe32c111078d196f21b886de2554089