Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c968f96be9ed35…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 12:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dad33141bbf5d21a618ea6dde217691b SHA-1: 0916e569aab7e3a7aaf5f2d4d0679066ce8b1676 SHA-256: 22c968f96be9ed35417ec6dc2a546588509a64d3001dabc6a8d251f7e1bf0762
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://leonvi.ru/award?keyword=wisconsin+common+core+standards+math+4th+grade PDF link annotation
    • http://eslife.pro/vunigarurisogijalodotijo3zjaq.pdfIn PDF document text
    • http://testvvd.xyz/93304931441q6lfb.pdfIn PDF document text
    • http://mazers.fun/which_of_the_following_views_of_weather_is_an_example_of_systems_thinking6spmi.pdfIn PDF document text
    • http://lifizix.22web.org/kudupeg.pdfIn PDF document text
    • https://mipixapotorifa.weebly.com/uploads/1/3/0/9/130969355/lafusivinisule.pdfIn PDF document text
    • http://ehaberdevlet.com/bamse_och_dunderklockan3uutz.pdfIn PDF document text
    • http://obschee.xyz/dilbar_dilbar_song_dj_remix_wapwon4etdq.pdfIn PDF document text
    • http://creditactive.info/rotegurnp54m.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/fasomusogapovi/noxaxolepikijijozokame.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/cash_for_apps_mod_apk_unlimited_points.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/70660377320.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/havells_ceiling_fan_catalogue.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_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 5420 bytes
SHA-256: 92f54caf610ef78d516396be7d2da990a0b0cf5b61d05b17cf5e5d75763cb987
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10580 bytes
SHA-256: 5d0d072e1da60c0d98edf5d8c3415f7fe4806817ae96a1a3930206d6c6989523