Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6aa74cf49cdc569…

MALICIOUS

PDF

66.6 KB Created: 2021-03-03 23:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: abc3dd01f95abd057e8c084e662d703c SHA-1: bde5bce29aeb413a1796108a003500df8f948b23 SHA-256: f6aa74cf49cdc569d2dcfdfb08f2322488db60dc218cf431a1f9e3f918f6d106
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://xajibur.ru/aws?utm_term=how+to+build+a+bridge+out+of+spaghetti+and+marshmallows PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368265/normal_60382a5ef4097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5fe709baf239f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_602b7375e8779.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/ihcNji3/likee_logo_image.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402520/normal_5fcd0ec98ed1f.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/1Thiih1/osrs_wyvern_bones_ge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447626/normal_5ff66e1dabd04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5ff0be65697f9.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/GlgijjL/fitemulinibodokopip.pdfIn PDF document text
    • https://bofanowowedo.weebly.com/uploads/1/3/4/5/134506880/zadosogejimapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60174adf019c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409395/normal_5fdecdf5df539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikazunelovo.epizy.com/scratch_2._0_free_for_windows_8.pdfIn PDF document text
    • http://maxaluvobewog.epizy.com/49998084322.pdfIn PDF document text
    • http://jizuvopanusin.rf.gd/consumer_reports_cantilever_umbrella.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_off0000c7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C9 5648 bytes
SHA-256: 9c154b2d812fe190569f212f4eeedf9dfaa402704be946b4c6e6308a54039496
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 9988 bytes
SHA-256: c04136fa1302cfee3a53487f6ae32269ef2ea9c535f04157085ad97ec7c3077b