Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1687da61b3e5241…

MALICIOUS

PDF

71.3 KB Created: 2021-02-11 18:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e111d14978054ded7a1c94fd2edcbd13 SHA-1: 9a30d0a9f5ae3d3bacff41dcd5700672c2142d20 SHA-256: f1687da61b3e5241a79e24e08116ed534f262ddb96d6737583d6bb0b114cabf9
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://maypoin.ru/wix?keyword=how+to+install+mod+kenshi PDF link annotation
    • https://cdn.sqhk.co/bepasasa/4hcdtig/digital_marketing_program_harvard.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/7087754.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/9594335.pdfIn PDF document text
    • https://buvewetaki.weebly.com/uploads/1/3/0/7/130775635/6421555.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/9294.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/rgcgghe/bojuwubekiruvajixe.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hj9nThh/plus_point_services.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/8a8f309c0781b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/13337442959.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/zuzadojarex.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/graphing_quadratic_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/redinababapiribekojutorus.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/navidiropagikojatu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF3 4876 bytes
SHA-256: bc4c8760bbcf94a535e7dead71d0be0211900a3594324a3c99c4287b54a0ed39
font_01_sfnt_off0000de5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 10564 bytes
SHA-256: 6a94d0cba7c96129a6e61aa26cd910af23d47df5f6ca0fea3597fd481ef7df35
font_02_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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