Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dc377f6212af27…

MALICIOUS

PDF

70.6 KB Created: 2021-01-26 00:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 83ff5e4a60721debdceee2830be5e3b2 SHA-1: 0c6bfff5484707aedea9f0f2df5b7fee69474920 SHA-256: e4dc377f6212af2727ca6e63ef20b9ab783634024722d2f101571a9d07f9ea3e
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://yafferge.ru/aws?utm_term=set+repeating+alarm+android+not+working In PDF document text
    • https://static.s123-cdn-static.com/uploads/4376601/normal_600526a513573.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/zefozezudigoje.pdfIn PDF document text
    • http://gidilixad.66ghz.com/1424028459.pdfIn PDF document text
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/8475039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368251/normal_5fe2954e667fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5fe7de7c75433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_600a9063b14af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5febe0cb3f778.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/musuxofari.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/cjgvc4C/exploration_summer_programs.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/7623874.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/bupaxomu/joxoselokowegovup.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/govupimalaxuxudijirifi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/31766486504.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/certificate_of_conformity_coc_dubai.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_off0000d7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 5360 bytes
SHA-256: 2f570de254d261a799ff7c592029c521cd63efe91c60c7cba9c70d94b33230f9
font_01_sfnt_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 10412 bytes
SHA-256: 66c4ab27280552757e20e943119097109a8a8ccff791b1da730da8f64626e1a2

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