Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dcb42db5cb81e7…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 10:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2689815ccaddf61806d03368e325bb7c SHA-1: 43846c3b33b05bc5992aab94914f1df3c34df937 SHA-256: 86dcb42db5cb81e77e645f6d7bea3c90bddec05a7e320efad045e3dfb84ec909
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=ustv+apk+free+download+for+android In PDF document text
    • https://zagozejidenadap.weebly.com/uploads/1/3/1/4/131407028/e58ca8aedd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_600af9bfa8e8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404108/normal_5ff188a360fa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424378/normal_5fc615972f33a.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/vugatulajobiw_fipipoxune_mukigato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fd049d62bc66.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fWQCEgh/disney_wonderful_worlds_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_6006123ab0b64.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/Pjf1gdi/gravity_bong_piece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5fd7a386a939a.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/vChciiD/draw_storyboards_on_ipad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421336/normal_5fe33ab38fa47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fee6d479b9fc.pdfIn PDF document text
    • http://hookup750.website/20271681484n3dad.pdfIn PDF document text
    • http://im-marceting.site/werewolf_the_forsaken_character_creation_guidefes8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/gfcibgh/53045988142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5244 bytes
SHA-256: d9a42ae0d458b991de968280fa6309ae1426e21631670edd5be3fe440f42c28c
font_01_sfnt_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 10444 bytes
SHA-256: 483ecb969418ae4821c34b0bb83f04f4d380d60328c568ce3eb2bb42a3dc31d0

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