Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4502ec813812221…

MALICIOUS

PDF

67.3 KB Created: 2020-11-24 01:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5de9ef71449d1fb5375bd50515e47768 SHA-1: f8cff017e6b7294173e0fe7b3fb353b602b48d65 SHA-256: e4502ec8138122216cdd1a417c798893e84cb06dd57ed4fced9dd6473afd4aa0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/aws?utm_term=hp+application+lifecycle+management+pdf PDF link annotation
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/6c7a948f1f0ad2b.pdfIn PDF document text
    • https://lolipakefupixo.weebly.com/uploads/1/3/4/6/134614949/vixefexet_vowasavuvutoku_gonipos_lalulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f8a794683b3c.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/b00d611f5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5fa07313de1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f90333cf2e0c.pdfIn PDF document text
    • https://fewarixavaj.weebly.com/uploads/1/3/4/8/134847043/2121984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f92585b8c215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5f92b2c36cf58.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/dosofijuxu_kisapivowug.pdfIn PDF document text
    • https://wegesunovajoj.weebly.com/uploads/1/3/4/8/134887244/fakafeponuwibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 5264 bytes
SHA-256: d36207117ca5e488059424bea96072274021594f86d00e08384da2595583c3af
font_01_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 10532 bytes
SHA-256: 491c4ff3ea199d00300206826091d5ed49910cfbf79ab0e5339407691968eef2