Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1d608a61358cb7…

MALICIOUS

PDF

62.0 KB Created: 2021-02-20 06:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a5ab75348eea8c0bb8f8b48eb414fe23 SHA-1: 1dcbddfee1268d4639a827bcff85f3bb0ee3f4f5 SHA-256: 5f1d608a61358cb7c497a39fc5eae84a4f25e6cb64677c78483f83e61ec6470f
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/wb?keyword=hitchhiker In PDF document text
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5fe14bab7552e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_602c8416b7df3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5ff88e40e75eb.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/7084375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fd0925c17d7b.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/4585007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5fe90093a5213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fff0c41def8f.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/xakomefo.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/1540380.pdfIn PDF document text
    • https://bizepusenovub.weebly.com/uploads/1/3/4/5/134509919/4694635.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/sefepugolupalax/sat_math_practice_test_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/kigejufedexoruras.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/73444134701.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/cahors_transformers_india.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_off0000b4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AE 5632 bytes
SHA-256: 3dc470b951fb56dd9b1b8ec295c284216af5e6c2640b0c02e45b0011096100d0
font_01_sfnt_off0000c7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E5 10176 bytes
SHA-256: b1586f79ed33069ba8f758210449671663891a29342a97381530a323380c57a0