Malicious PDF — malware analysis report

Static analysis result for SHA-256 30762aa2d560f3c9…

MALICIOUS

PDF

62.0 KB Created: 2021-01-25 07:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 234c0ec34a8ba069e2c7e382f4081604 SHA-1: 65fc8eaeb508306c999fbc8dd64a6fd271424981 SHA-256: 30762aa2d560f3c916f345c54b6cd204cb68ff9a3f4a61551e627f92639ad442
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=afunika+piki+piki+skirt+mp4 PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/hjbvig5/92643130552.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/jIii7hi/tolaga.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/8774425.pdfIn PDF document text
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/rarurijagok_poxobu_rupizifiviva.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/MNiheuY/beat_the_boss_4_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/ba6fgge/setegamilekaperejajilago.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/540d64a0280.pdfIn PDF document text
    • http://myyshooop224.site/spaceballs_teaser_traileri77ba.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/0732b89c5142c6.pdfIn PDF document text
    • https://giligigava.weebly.com/uploads/1/3/4/4/134494785/f9373166f0ba3f7.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/gogunabones/google_chrome_extension_video_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/neonatal_patent_ductus_arteriosus.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/domino_s_pizza_uk_allergy_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/bittencourt_penal_especial.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/47534694941.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_off0000b753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB753 5156 bytes
SHA-256: c929ee5cc34ba29c71b63f2d48d572e75224d963a4b3e946ce6ab12b87493e72
font_01_sfnt_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 10148 bytes
SHA-256: 2c28cd150f36a78b24a7163bbe0a7d7466e4a278828e6fa97e2608b65c92e487

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