Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1420c1a02daf021…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 12:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 91e4670f413dca0eaeb51f71b863889f SHA-1: 521797be060f1c7f8337e5b1c10a8aeb643c2cc0 SHA-256: b1420c1a02daf021dfb351d53ef449792876807a2fa07003db14b77f9b48a7ec
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://druttle.ru/wix?keyword=beepbox+songs+links PDF link annotation
    • https://cdn.sqhk.co/jarixizotib/VQgsHii/super_splendor_online_booking.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/qiejkek/how_to_enable_merge_shapes_in_powerpoint_2013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_60265afc178a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384633/normal_5ffae905e4f33.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/ijMjfij/covidwise_app_security.pdfIn PDF document text
    • https://judavolegarar.weebly.com/uploads/1/3/1/8/131871921/ribipusij.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/hfhghgK/85966503620.pdfIn PDF document text
    • http://verezitabel.66ghz.com/business_card_templates_illustrator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fec8f69bcc84.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/miwolezedubujoz/examples_for_formative_assessments.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/97136739443.pdfIn PDF document text
    • http://zasegusof.epizy.com/xarijofudepolajiguwobuno.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/96917628661.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/rutofomefijowaduver.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_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 5000 bytes
SHA-256: 23eae8ad64b73b90f6a539b88e7662c7bb2edf6b87ce102773a4d05f82710e34
font_01_sfnt_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 10440 bytes
SHA-256: 283067869479186d3d0b9e326da487fab1cbd153b062ef369013a1013aaecd29