Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc49b3b4ab2bcc8…

MALICIOUS

PDF

69.5 KB Created: 2021-02-14 21:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7ce09da029c578e5e79f8b8e76dc06fc SHA-1: eb2830a72b00fb4f24e8f6d542aa53145092bc07 SHA-256: 1fc49b3b4ab2bcc81dbdaf5e340ddac2b6df581441b52e8a5c9b40ceb2e7a59a
244 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=nyrius+aries+prime+manual In PDF document text
    • https://cdn.sqhk.co/definuseju/mjfLFW4/tamago_monster_season_2_mod_apk.pdfIn PDF document text
    • https://videxopejevis.weebly.com/uploads/1/3/5/3/135333638/lupibobofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_6020a12c0b4c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5ffbbd0470156.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/kudumu.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/bMihhab/famous_french_songs_sung_in_english.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/8e7a2.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/s0jagca/medbridgego_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/giQkiaZ/tolexena.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/fjihiie/pogasekebofafolulunaru.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/zgeIgg7/33931623402.pdfIn PDF document text
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/5775284.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/fjhvggc/fivagedevefibusen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fee10f578c70.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/tudoxiviwi.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/bifamomove/domemudumeduxilipiromiro.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_off0000d141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 5036 bytes
SHA-256: 971e4acb8bc5b16c6b77daf7e00bfdd14ecb37f7cd21ad4ca73085016f52d38c
font_01_sfnt_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 10884 bytes
SHA-256: 86db0a0287ba4ce5bbbc6b21577fbc9d9acb5dcbba6f7562bf903589b03caa4f

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