Malicious PDF — malware analysis report

Static analysis result for SHA-256 133bd10b21ea83dd…

MALICIOUS

PDF

75.6 KB Created: 2021-02-21 17:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1e029f4b753ac2c1b9ad5993b8f7db5d SHA-1: 80543a55b8970d61befa52109bb49893f7fbf069 SHA-256: 133bd10b21ea83dd760105a2a9d2eb6cbb4b50f0ccf8ff395d24a28f8ffe444b
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://jottigo.ru/aws?utm_term=black+and+decker+food+processor+fp+1800 PDF link annotation
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/jowoziporosoz.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/Pjcibhf/xewigor.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/wasuzupowaxikepok.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/6266579.pdfIn PDF document text
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/9549592.pdfIn PDF document text
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/depexa_sudogisa_pifubuno_wazidunovasuwi.pdfIn PDF document text
    • http://brandframeb.com/ssrs_heat_map_reportxlau5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lubozudaxik.epizy.com/73633348539.pdfIn PDF document text
    • http://pomirunorejuso.epizy.com/dc_voltage_regulator_circuit.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/gabilatikawixat.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/bigajetabuparagufa.pdfIn PDF document text
    • http://zavivemigowoson.epizy.com/my_name_cake_pic.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/89169206220.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/brother_sewing_machine_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/birthday_flowers_gif.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_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 5652 bytes
SHA-256: 6e34d81b0447d90ee6fd5cd58c9f1a2a16ae652b18c2f4867d38e25a8c372a98
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 10904 bytes
SHA-256: 426f07787045efd5f2b5a10e6f89ac7e6f117a6d00d27201a1955f0f05062b81