Malicious PDF — malware analysis report

Static analysis result for SHA-256 2490131650bd7678…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 12:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0bc8669b656c57c011d6cf1093185de9 SHA-1: a3ec4de0d58156d1c20b075462981d5c94555f08 SHA-256: 2490131650bd76787f09f56fdfd01c135b0e8989d701b23447bf29b938bb2b4d
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://gimoguvi.ru/award?keyword=how+to+connect+a+netgear+n300+wifi+extender PDF link annotation
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/semejebok.pdfIn PDF document text
    • https://gapakoxolu.weebly.com/uploads/1/3/4/7/134745497/31427db.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/bJhbgj6/automatic_photo_background_change_software_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/fHMidgc/51982389679.pdfIn PDF document text
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/2389636.pdfIn PDF document text
    • http://claire-irk.ru/39756448875oxiaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/93pYjbo/36509995658.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/hahage9/44682284222.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/ibziage/falling_for_christmas_movie_cast.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/mokixetat/9906327992.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/aahat_serial_full_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/nuwugesafijibakakux.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/age_of_empire_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/informant_app_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/fundamentals_of_microelectronics_1st_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/19232076217.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/kefaru.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_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 5408 bytes
SHA-256: 4b1bc732d4dc1c411e147a762f58b7c06b5e58fa1e73d370dbafa4b0df3af419
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10552 bytes
SHA-256: 1ee379dd1eabce4eceefb300e4c4e89c9de310e4886eefcda1cbde1de1542556

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