Malicious PDF — malware analysis report

Static analysis result for SHA-256 248c554ba950a1a9…

MALICIOUS

PDF

68.5 KB Created: 2021-02-22 11:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 87defc3c7d3ecd49921a562cdbaae33a SHA-1: 460c704ae9f98b35f8aae00b417718869ed54af5 SHA-256: 248c554ba950a1a91b0cd81ba33d461d033c25c22b94c79c579de68d4582f23c
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://jottigo.ru/wix?keyword=taurus+pt111+manual PDF link annotation
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/60a3b691cc72.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/ihVxge6/angry_birds_evolution_2020_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/jWhbpvr/86498760143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_601e3a90c97ed.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/lebaxa/21270576173.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/mpsc_prelims_2019_paper_2_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/57431371422.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/81292618754.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/luwefazozapoxepisim.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/electrical_cad_blocks.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/wiwamoxalazodabok.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/18343684273.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/hurting_each_other_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/31389479932.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_off0000ce7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7D 4964 bytes
SHA-256: 3db4110956250671858177ae729ca098d721afac78ba275553b09dae1d1c1653
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 11476 bytes
SHA-256: c972705a321876c3d5e75983ee70f2980cebf342a2a56385c5f2be840c08b46f