Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4d4c858484e1d7…

MALICIOUS

PDF

70.2 KB Created: 2021-03-01 17:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2670fa282e5d4999766f24a45773111 SHA-1: ed103518e60cf62b980a5897a818beaec6146184 SHA-256: bf4d4c858484e1d73b4388c3514c11aeb9af1c399344c0898da19f0f0966af50
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://pelibifir.ru/123?utm_term=biblia+devocional+de+estudio+reina+valera+1960+pdf PDF link annotation
    • https://vezisadorudaruj.weebly.com/uploads/1/3/4/3/134349324/9449426.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/sole_elliptical_e25_vs_e95.pdfIn PDF document text
    • https://xuxudufekew.weebly.com/uploads/1/3/0/8/130873992/2308934.pdfIn PDF document text
    • https://motedozanegiraz.weebly.com/uploads/1/3/1/3/131383309/segakarurupevelomabo.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/65505931523.pdfIn PDF document text
    • https://zunezazawegor.weebly.com/uploads/1/3/4/6/134665047/5689889.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/8686907.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/7767191.pdfIn PDF document text
    • https://zugedogal.weebly.com/uploads/1/3/4/7/134748632/2b6789.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/self-reliance_transcendentalism_definition.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/womupoxapefixa.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/sixenogafopoj/how_to_make_a_square_tube_bending_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/daily_word_ladders_grades_4-6_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/rolunujipexulusenemawoja.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/19998190311.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_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 5904 bytes
SHA-256: 85547e17425e765ffa7dd0f0ac28fd670f2f7960587900b8ff758925767316fa
font_01_sfnt_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 11672 bytes
SHA-256: d945ab9c28d8af03b66e715ef9c73e99458608565362ebffc101204b019cf722

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