Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dff94f86e630c7f…

MALICIOUS

PDF

65.9 KB Created: 2021-03-03 04:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: db65e138f2b186eb5327426097d2c09c SHA-1: 2d3308e4fee626b9ea846103a8f0389edd8c0a2c SHA-256: 1dff94f86e630c7fc26414bf2cc1420814f8e019ec2a185f6e6aecce43fe3efa
196 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
  • 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://kuzutuzo.ru/award?keyword=seventh+grade+math+textbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413375/normal_5fc7562357e16.pdfIn PDF document text
    • http://zatodawu.iblogger.org/a_monster_in_paris_full_movie_download_in_hindi_300mb.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/16090bcc0f31.pdfIn PDF document text
    • https://janepowowufevi.weebly.com/uploads/1/3/4/5/134506071/1880401.pdfIn PDF document text
    • http://jelelegukawox.22web.org/21879239084.pdfIn PDF document text
    • https://rejovofutilux.weebly.com/uploads/1/3/1/4/131484728/4221936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc7215e5bcd0.pdfIn PDF document text
    • http://davilebut.66ghz.com/organizational_behavior_topics_for_essay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5fe389ee89c9d.pdfIn PDF document text
    • https://tubuporupuruder.weebly.com/uploads/1/3/4/8/134879971/7e918912919.pdfIn PDF document text
    • http://mamontov-net.cc/xerowaluvobiserer14zif.pdfIn PDF document text
    • https://dulodegusatoto.weebly.com/uploads/1/3/1/6/131636763/mexoruwepokagez-wofeforowusexe-gidubasofaw-foxenujib.pdfIn PDF document text
    • http://uablog.website/94921120996pyuw7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fe43a09c914a.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/wenobagupexekap/60204488458.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_off0000c531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC531 5680 bytes
SHA-256: a398efc1b83ae51eb516aeb7b942f4fd123c0720672770eef8c3a9b56e1d3e34
font_01_sfnt_off0000d863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD863 9880 bytes
SHA-256: 65115fb2e959d5a57f35ff454094acfe89dbb01f7192780f3994ccccc30f5bba