Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f74f7cbdb7d60ae…

MALICIOUS

PDF

69.6 KB Created: 2021-02-16 05:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: da6db50f8b7a83cd6b53db2c79b0d4a2 SHA-1: 687c79f1142b649ecfbe1547beaecad0e372f559 SHA-256: 2f74f7cbdb7d60ae8bfe1ee6d2e79da01099a4cf1abb30387c53e10119a632b5
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://crophysi.ru/123?utm_term=enchantment+my+sunshine+is+fading+away In PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/6jbJVgd/livit_live_streaming_app.pdfIn PDF document text
    • http://megalit-korolev.ru/trigonometry_class_11_ncertgd8w6.pdfIn PDF document text
    • https://wupexuzirat.weebly.com/uploads/1/3/5/3/135338028/3b457da307f06e3.pdfIn PDF document text
    • http://natlab.ru/tuzozobolibovozopojusisn7t31.pdfIn PDF document text
    • https://xavitutasufeja.weebly.com/uploads/1/3/4/6/134669981/286d83de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5ffda8d864229.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/rYhKajf/maxebageluk.pdfIn PDF document text
    • http://goldotzyv.ru/amrapali_full_movieuy3ii.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/nasas.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/bJWUeGm/1112312825.pdfIn PDF document text
    • http://1ux.site/pafazasozokoxijagobefufe6502.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/mzgcjcZ/zobeviz.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/5789312.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/mosezavor/bsba_degree_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/html5_bootstrap_table_template.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_off0000d1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B0 5460 bytes
SHA-256: 5a237c5a391b852ebd99736b5ca56ca0ca9eb88886bc265c135f42198141c603
font_01_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 10976 bytes
SHA-256: 9300c6ed6c3decea94c071c85989d202e7f9320a569f2d9b9a20152d745b5be8