Malicious PDF — malware analysis report

Static analysis result for SHA-256 19139d97f7027abf…

MALICIOUS

PDF

65.6 KB Created: 2021-02-23 05:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d1a418dd6b18a9dd4584f8d012788531 SHA-1: 97ff520ecaf152a8ac138547d7c95c2a6ecb81d0 SHA-256: 19139d97f7027abf12a8471b07261feecd9dc38cb77365ce3549c57b90c1d2c9
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://jottigo.ru/wix?keyword=ib+french+sl+paper+1 PDF link annotation
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/xavevojalu-taguxevor.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/best_aquarium_games_android.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/midabowejetep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fc883ea1c54b.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/ddeea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482636/normal_5fe2520e01ca0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fdede9abccb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fe0c3195deaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495264/normal_5fff6adc3b41b.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
    • http://ripapekum.epizy.com/bagorunodugaweno.pdfIn PDF document text
    • http://lekinip.epizy.com/xaredaz.pdfIn PDF document text
    • http://surafupomef.epizy.com/introduction_to_human_anatomy_and_physiology_answers.pdfIn PDF document text
    • http://rilopuxam.rf.gd/44036118715.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_off0000b82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB82F 4780 bytes
SHA-256: 6660412ce7afb3cdf821fa1831e74d804f3ce7457db1af6f9305c6a0d6096a0b
font_01_sfnt_off0000c850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC850 10444 bytes
SHA-256: be876c0d165ebe237c85d9b2ad9fd14c0cdec6e5bf09512d31d5397f6737190b
font_02_sfnt_off0000ec04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC04 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f