Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b10ec49293b0ba…

MALICIOUS

PDF

73.3 KB Created: 2021-02-08 18:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5a4b86984f62520daf52eb42d055b5ab SHA-1: d5a0c44cf4383a58d1f50128277759d990b2c41b SHA-256: e9b10ec49293b0ba40e640b226b77180659264b28ca1459be330dd327937f52b
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://seumenha.ru/wb?keyword=professional%20letterhead%20templates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374185/normal_60203488ad8b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fff7cea0778b.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/9913672.pdfIn PDF document text
    • https://gepumisi.weebly.com/uploads/1/3/4/5/134517510/xorotokezedudow.pdfIn PDF document text
    • https://cdn.sqhk.co/mabuviko/O5sggdL/kidivovedelomewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fda1dfbbdb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5fd391674f649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386828/normal_5ffdbab514bf4.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/rixufevedaso-pitikedal-xolamigiwuzat.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/daselex/72095809518.pdfIn PDF document text
    • http://zobemodorujo.rf.gd/aata_aarambam_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/71452010800.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/qa_analyst_interview_questions_and_answers.pdfIn PDF document text
    • http://xiriranur.epizy.com/near_double_facts_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/beatles_abbey_road_50th.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_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 5280 bytes
SHA-256: cbdfb6d69c774931931c528a9a2e6e8e29866b436137d1901d72c41a24930470
font_01_sfnt_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 10704 bytes
SHA-256: d1d517122448e01780e22220dd20320acfabb79c4bad05a643da6b8fd23fdac8