Malicious PDF — malware analysis report

Static analysis result for SHA-256 397c201fee95d6d2…

MALICIOUS

PDF

70.5 KB Created: 2021-01-21 09:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 1309751ab83c0f798364aa9233ec108e SHA-1: d8843de7dd1c816720293527ab0e62f3ec32094f SHA-256: 397c201fee95d6d2f1d707fa5b860019ff039d9ae746ff2543884f2b461a452b
254 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
  • 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://yafferge.ru/shook?utm_term=does+roku+have+fios+tv+app In PDF document text
    • https://site-1167953.mozfiles.com/files/1167953/crazy_games_pixel_warfare_4.pdfIn PDF document text
    • https://site-1247042.mozfiles.com/files/1247042/beginner_bodyweight_workouts.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/xibojakiduwowolebim.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/berekizinobij.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/dinosaur_simulator_2_dino_city.pdfIn PDF document text
    • https://site-1173259.mozfiles.com/files/1173259/28024196636.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/fadobirak/jepum.pdfIn PDF document text
    • http://ketanuviz.epizy.com/challa_song_mr_jatt_ninja.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/29287372172.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/32088955874.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/namakifebopuwones.pdfIn PDF document text
    • http://bajobakokela.epizy.com/puwemikaxiludomow.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/excel_spreadsheet_won_t_sort_by_date.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/69583612088.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/kindle_cloud_reader_free.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_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 5080 bytes
SHA-256: 2839c27e5cb432eeeb87bfe8902f86f2f0a7f658f577ee54352eb5830ccc95a7
font_01_sfnt_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10588 bytes
SHA-256: 739308291e6a5986b1310defeb47fd87271608550beef0d55b24c6cc4c24ac7e

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