Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28ce5e61b471294…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 15:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1daabf1d0715fa9d0c3175e0e542fb06 SHA-1: 887fb4b29903e2cbff3bab0816049bfe2dc8a192 SHA-256: e28ce5e61b471294a207f1e8a38486f941acf42ecd338305ba9dece9e20ab53d
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/award?keyword=what+does+health+and+safety+training+include PDF link annotation
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/49fc1985b64bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_6022ccb5eb0ca.pdfIn PDF document text
    • https://cdn.sqhk.co/zitibidino/imNbihY/regal_movie_theater_moline_il.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdfbd5c44868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455381/normal_5fc8be3d041f1.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hiMgia4/throne_rush_hack_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_600bca93d63b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6025fc7f2ba64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5fc94176b43ad.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/hejghhg/advice_chat_rooms_free_no_registration.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/54d96aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_602c15744f866.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hehddZn/whatsapp_messenger_for_ipad_apk.pdfIn PDF document text
    • https://dijamolilum.weebly.com/uploads/1/3/5/3/135347404/dalafimopaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414353/normal_5ffa957d5ec26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_60034434d873c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litopojijerel.epizy.com/nacte_guide_book_2018.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_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5400 bytes
SHA-256: d58397f1491af03d43b46c62a271d29378e1a6e156d1a777de904a588613fc53
font_01_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 10492 bytes
SHA-256: 0f94dcec1f6dd05b0a9c9f0220a2d0edecc572e6ac2b61e4e6e9d7186e6b1154