Malicious PDF — malware analysis report

Static analysis result for SHA-256 2720fa895856d97d…

MALICIOUS

PDF

68.0 KB Created: 2020-11-20 10:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: f6cc5fe2880b0e8636eebbed8f5c5139 SHA-1: 77059468b294650af00ab96b599ae153b98b0787 SHA-256: 2720fa895856d97d8b93089102c951c799efa85e1b7dedc84548170c75209f51
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ggtraff.ru/aws?utm_term=define+linear+transformation+stats In PDF document text
    • https://porutopor.weebly.com/uploads/1/3/4/5/134515231/e13944c6f27.pdfIn PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/6534d0.pdfIn PDF document text
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/ronazikobakef.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/rixuge_kugodusegatafu.pdfIn PDF document text
    • https://bavibexovapow.weebly.com/uploads/1/3/4/6/134643610/6977973.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/56c4742ffb2635.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/4d1634a902d.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/muwemivumazulax/drivers_ed_manual_massachusetts.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/numomuvatuwiju.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/unc_mens_basketball_forum.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/occupational_safety_and_health_act_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/koontz_lake_association_clubhouse.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/unt_bus_schedule_discovery_park.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/18302466010.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/wiset.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_off0000cf69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF69 4912 bytes
SHA-256: cd49787925256f9f711506d7e17736622bed0e46862ea7c7b5537c4ad8e44ef0
font_01_sfnt_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 10332 bytes
SHA-256: d3a79d746d07f9d4cec5af91ae8d08ce2eb0b26a870bc1ee42b577e74068a982

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