Malicious PDF — malware analysis report

Static analysis result for SHA-256 656339a1f0857868…

MALICIOUS

PDF

79.9 KB Created: 2021-02-21 01:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5752be3e73cb891108ecd1666e9b1b07 SHA-1: 04a56f946480d7b34042cfbefad9f2aced569028 SHA-256: 656339a1f08578680ef16e525b776b19c4fa417a2092cb641649610a5bd63808
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=what%20does%20rational%20religion%20mean%20in%20math PDF link annotation
    • http://businesslinecenter.com/convert_docx_to_apache_poijin7j.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/3539212.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/9656425.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/gdHhhj1/interval_timer_wear_os.pdfIn PDF document text
    • http://edaruzal.xyz/11931970649ro7gx.pdfIn PDF document text
    • http://flylovel.com/digegegipemixaketenoxiromv9yhn.pdfIn PDF document text
    • http://myirn.icu/xakoxode56pdt.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/39285087e.pdfIn PDF document text
    • https://tadirexexex.weebly.com/uploads/1/3/2/6/132695418/kafikimabab.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/lerixitafawufulozu.pdfIn PDF document text
    • http://enots.space/thank_you_mam_langston_hughes5hwlb.pdfIn PDF document text
    • https://wesedujixezibo.weebly.com/uploads/1/3/1/6/131606467/2d2a454.pdfIn PDF document text
    • https://jatomotubaw.weebly.com/uploads/1/3/0/7/130739460/vewexo_jisikebegus_muburukas_faxefodowuvex.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/fomaralunex/lagu_bang_bang_jessie_j_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/zimivel.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/rajav.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/gupatawovatapub.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/xijipuzodadoliper.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_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 5252 bytes
SHA-256: 8eb4d20305857e580029dc9adae57a6c814428e34586af69b0b45068331009bb
font_01_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 10632 bytes
SHA-256: e13a44e8a41336ce8fc478be78778aae2228525b436c846cf8d4a9ac50b76853

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