Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1954187757a69c…

MALICIOUS

PDF

69.7 KB Created: 2021-02-24 19:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f780e787d1874a00cd988765c79223fc SHA-1: ec568d65ffae3001e2304a51e7469f5bbaf22360 SHA-256: 0b1954187757a69cff517d1ed98a947e1a7112aba148b6ead5f8b674a3eda1cc
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/award?keyword=davis%2527s+drug+guide+for+nurses+14th+edition+publication+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370529/normal_60321f0f3d803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5febef673c2d8.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/6811347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_601a6f8c12693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5fcddc26a36ea.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/kogofizilemawix_sajopafuti_murejiguso.pdfIn PDF document text
    • https://gejabadofezeda.weebly.com/uploads/1/3/2/6/132681436/5995841.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/9282415.pdfIn PDF document text
    • https://bogogumufen.weebly.com/uploads/1/3/4/0/134018830/4457351.pdfIn PDF document text
    • https://lubexunomug.weebly.com/uploads/1/3/2/6/132696146/2508761.pdfIn PDF document text
    • http://fujabum.iblogger.org/zapowu.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/143962c55229.pdfIn PDF document text
    • https://reravojune.weebly.com/uploads/1/3/1/4/131406269/2753533.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/vitelitubovuluj/62633559179.pdfIn PDF document text
    • http://vemesivudaro.epizy.com/xaniwuveriwejipisikot.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/figimipigigoje.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/22164835425.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/punjabi_status_badmashi_video.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/vutidapagafesawaxas.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/tazagoguvebifife.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_off0000d0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A4 5788 bytes
SHA-256: f5100e517983af9f5e7cb39a0aab23bf7cd957b4cf11432bad7c26d5c4165a71
font_01_sfnt_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 10664 bytes
SHA-256: 3c5d543dfc2b0c6fcc2bf06d2488288acff822f71541e8bcf960a58728e1d735

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