Malicious PDF — malware analysis report

Static analysis result for SHA-256 39313769fd70e4fd…

MALICIOUS

PDF

42.4 KB Created: 2020-09-18 17:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ef30536fa9b6d4145020efdec5bf544b SHA-1: 639071f7bac27509d9065b6425a9bff86f1eb802 SHA-256: 39313769fd70e4fd965a70a19e0ce0c256afdccd578c14174d12504982f60906
234 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.me/pify?keyword=america+2020+stansberry In PDF document text
    • http://rizolagid.buttaflyjonez.com/uploads/1/3/2/7/132741615/veguvilofezelal.pdfIn PDF document text
    • http://xokafo.netcabinet.ru/uploads/1/3/0/8/130813554/resifo.pdfIn PDF document text
    • http://files.fusioneventsworldwide.com/uploads/1/3/1/4/131483830/kexugesidago.pdfIn PDF document text
    • http://files.chinchenst.com/uploads/1/3/0/7/130739809/9157142.pdfIn PDF document text
    • http://gudobusar.southfloridasanctuary.com/uploads/1/3/1/8/131871768/bogewutetikovan_farajimobo_tuweserekuji_visomebezidipan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/gonugedamavot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/17206949965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7692/files/16576309792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/antrenmanlarla_matematik_3._kitap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5311/1704/files/41299333377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/gnc_pro_performance_creatine_monohydrate_5000_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/kutuveteti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3766/3903/files/4x6_postcard_template_photoshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/50475635177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/suziwixutesewozibaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/boylestad_electronica_analogica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9156/6248/files/mejor_forma_de_absorcion_del_hierro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 5096 bytes
SHA-256: 7863dac6f9fca40d5a315ab05fe8461ddcca50f342b180c452b65616e6ea7bd4
font_01_sfnt_off00006b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B08 10460 bytes
SHA-256: c8184ac9472932d95d3e8077175ac7b3c1776a14302d0096f4a0c7f50561ec6f
font_02_sfnt_off00008ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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