Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94151e998d25fb8…

MALICIOUS

PDF

72.0 KB Created: 2020-11-11 00:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4c14cb27d1e9fbc2b45e0f647c25be0f SHA-1: 4f986a2dcadc1869c24914bf1cfbba64b7c7b222 SHA-256: a94151e998d25fb8492ed0ec5f355f27c6f15a41593270d20937271c4ffd6c4e
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://traffking.ru/123?keyword=municipal+center+district+heights+md In PDF document text
    • https://lebidupevi.weebly.com/uploads/1/3/4/3/134319251/2a9d44fb28e.pdfIn PDF document text
    • https://bagolisenavela.weebly.com/uploads/1/3/4/4/134496394/juguniwopef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f95497d555a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8715ad0f29b.pdfIn PDF document text
    • https://mekivigabu.weebly.com/uploads/1/3/4/0/134096936/dugamoradob_visezokesu_pegufive.pdfIn PDF document text
    • https://fusupolupiritox.weebly.com/uploads/1/3/4/3/134374508/802035.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/zirojopemup/khng_c_c_file_trn_firefox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7adfba0-ac25-4e17-b770-6bd8fd6e8035/rofoxexifepu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/dnd_beyond_merrow.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/nubexuvugerenebitis.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/49756010599.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/walnut_creek_middle_school_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e0532c-b64d-4b56-9c0b-b47eb2c9d2d3/ew36_mobility_scooter_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba0408a-95c2-4edf-841c-acee668a6bb7/77455369943.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_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 5492 bytes
SHA-256: 35260dc27d5eff34878b8fb0edfddcec33c2e883662e1021fc0f028f043fd7b5
font_01_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 10820 bytes
SHA-256: c871e2aab1bc62c078f18ad36596d74f4a6ed0045382777ecf647cba159cc1b7

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