Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c897f70b133039…

MALICIOUS

PDF

38.8 KB Created: 2020-10-29 03:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 63340b44d5090c7890e76deb46c1a81a SHA-1: b1914d7d44bac3a1cb54fa7826fa14e6297e0cf7 SHA-256: 71c897f70b133039d21c8300b6b55156e34b03c30bfe18c0840b52509cd29168
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.com/123?keyword=banjercito+nogales+phone+number In PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/c2fe5ce9.pdfIn PDF document text
    • https://gobisenuginofaz.weebly.com/uploads/1/3/4/4/134490447/8162912.pdfIn PDF document text
    • https://wubixuduliku.weebly.com/uploads/1/3/4/4/134466255/9316781.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/2103241.pdfIn PDF document text
    • https://roguxewotare.weebly.com/uploads/1/3/4/3/134319265/xanupeda_wefezujodofuk_levotutumefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/fotemarowofotopifaber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98612b82-f0ae-4fb6-b90a-c05598461032/rawep.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/91293436829.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/challenges_facing_agriculture_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/skin_tooth_and_bone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab754467-5dec-497f-8222-89baed4c9882/dovekifobofezadutafaxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64ec5d9-6e25-4f4d-a8a8-e3e4da2a4eb3/sentence_variety_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/grade_10_math_answer_key_unit_4.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/vepasizotumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4286/3765/files/navigators_design_for_discipleship.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AF 5612 bytes
SHA-256: b99dd16aeecb7cf9fcf4fa732c87f11352fd310948301c3507d8faa72f47af21
font_01_sfnt_off00006a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9C 10460 bytes
SHA-256: 11d3f7421f6e8062c9e00911a13a24554006d6c1751cdd45e93091837c431513

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