Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed3485a0b03f1f0…

MALICIOUS

PDF

75.7 KB Created: 2021-02-10 10:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b86ffeba61e8129d2c221257683f962a SHA-1: 9292e0c0f0c9af3aa560e928649d24f3a78e9ad4 SHA-256: 1ed3485a0b03f1f076a278cfecf404d1cfcbc0c013de4e29f9d45b8956fb97fe
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=android%20auto%20sync%203%20messaging In PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/nubemax.pdfIn PDF document text
    • http://vvinorama.fun/aqa_gcse_biology_textbook_answers90zid.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/bodek-zaturi.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/21829d9a5.pdfIn PDF document text
    • http://premiumpornclips.com/baybayin_tagalogn5cir.pdfIn PDF document text
    • http://cosmicgig.com/boxotelotixivx2cb1.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/aa2410ac74.pdfIn PDF document text
    • http://world-wildshop.com/beginner_christmas_piano_sheet_music_freec34x7.pdfIn PDF document text
    • http://mon-cmbretagne.best/benar61m60.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/kalanejaxutilif/21688768346.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/25923774106.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/anbe_per_anbe_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/authorization_letter_format_for_passport_pickup.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/wrong_turn_5_movie_bolly4u.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/attack_on_titan_fan_made_game_android.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_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 5480 bytes
SHA-256: 1da067a5f96ece16c70ea5b3619c7c3589b5e20b622e90493287fa4fd90ea845
font_01_sfnt_off0000fc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 10980 bytes
SHA-256: b9cb12b1932f551a536e4607b25a9d2627b01b3121da4c3a704f1916d35cb99c