Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d12c82d9bfc7e49…

MALICIOUS

PDF

78.1 KB Created: 2021-02-19 17:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d5a6d57063e4021fbcba73121480d7dc SHA-1: 1ef81dd9ff0a54c22b3f43d7387272c871c60e0b SHA-256: 3d12c82d9bfc7e49b47a456537a162f67b9336350ffe82b719402fb025e63e5b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wb?keyword=nursing%20calculations%20made%20simple PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5ffbc48a8c8ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369917/normal_5feef578b6337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_601bbfbe2cd49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385011/normal_5fcb516da679c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fc91b8366ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_602ab38fa7b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fd2df0e25c61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5ff0bb2708102.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/mesotodimus/96347092698.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/music_box_dancer_sheet_music_free.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/alfred_marshall_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/dutojejop.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/lavoxurixi.pdfIn PDF document text
    • http://tozibuxadotoba.epizy.com/template_felt_baby_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/wazosoditimobipesi.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_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 5360 bytes
SHA-256: 5f7bd3e18158ab1d3e7d7f079aa1ee211689efbf358d5a2aeaaaa74306c93987
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 10908 bytes
SHA-256: 05269957db47eb4b50f74a44ca967bf3b71abb5a4d9a6a77287ce982c5e4ddfd