Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b27b3a625199510…

MALICIOUS

PDF

68.5 KB Created: 2021-03-03 15:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 91a48abe0f54be91259773a58689eff1 SHA-1: 94e574469e1b0dfae5c99605237b092ca7d10585 SHA-256: 0b27b3a625199510e2ecf685e4c3fcacc7e278cc698eae439fc36ae88bb1879d
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://ponafet.ru/123?utm_term=tabla+de+integrales+indefinidas+pdf PDF link annotation
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/sadidi.pdfIn PDF document text
    • http://hayatevesigar.online/the_chaser_short_story_analysisdsvoh.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/rekovajap.pdfIn PDF document text
    • http://hook-up.fun/my_ng_b_dell_optiplex_7010_sff_core_i5_3470fdbfw.pdfIn PDF document text
    • http://foyou.store/wotovedofitufizboq2v.pdfIn PDF document text
    • https://xodobojedabime.weebly.com/uploads/1/3/4/6/134675451/wogiriv.pdfIn PDF document text
    • http://importants.space/finunazedakekukanavalunesg6d3x.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/vaporonisu_dolivojol_mofevonak.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/difigomisosak/80191478110.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/winoxixizakegakik.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/xuroju.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/make_a_jigsaw_table_blade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/7396225007.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/geometry_and_measurement_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/43920609200.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_off0000c7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C0 5296 bytes
SHA-256: 37b5349886ce92aa2294654d24a08294f2094a47dbeb25f8494bafc498d6c769
font_01_sfnt_off0000d9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CC 13140 bytes
SHA-256: 0aef870f9ea27fa424a2503d4f6f59a971974d1f43d273ae8f40143f71d7b45a