Malicious PDF — malware analysis report

Static analysis result for SHA-256 720b16b73eefd545…

MALICIOUS

PDF

79.8 KB Created: 2021-04-09 03:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c86ea76492cf50a2dc4fff767006a57 SHA-1: 8579607cfdd9f26522b6cc7a40a8f233c37e6976 SHA-256: 720b16b73eefd5454ab55fde42a434d912a615e092a0e5cf01a9a12e9cb05606
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/strik?utm_term=butterball+xl+turkey+fryer+how+much+oil PDF link annotation
    • https://cdn.sqhk.co/madeparev/iatjhig/miwuv.pdfIn PDF document text
    • http://podarokinsta365.site/how_to_charge_small_ipod_shuffle35c32.pdfIn PDF document text
    • http://tublitalia.fun/one_hundred_chart_worksheet1vrl1.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/dihgfyl/iphone_11_wallpaper_hd_4k_nature.pdfIn PDF document text
    • http://kvyovk.xyz/six_principles_of_influence_robert_cialdini_19843m0mb.pdfIn PDF document text
    • http://igcopyrightverify.com/2184766433e487y.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/ehe6fjd/86052131564.pdfIn PDF document text
    • https://cdn.sqhk.co/xovopebe/ksDDOhb/84042950795.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/jheZjgE/6669404582.pdfIn PDF document text
    • http://harmony-market.ru/best_interior_design_degree_colleges_in_mumbaiwrhpj.pdfIn PDF document text
    • http://bcipreactivaperu.com/29483685222n39fu.pdfIn PDF document text
    • http://shimano-stradic.ru/lonilibuzafabemuxuweqm1i.pdfIn PDF document text
    • http://capridigi.com/is_super_kirby_clash_freeh84rb.pdfIn PDF document text
    • http://natfreshik.fun/72192407531qfk2y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palibam.atwebpages.com/90126571528.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/52475449165.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_39b3db38779f470eb668296b5976f17c.pdf?index=trueIn PDF document text
    • https://64f3f273-fd79-4cea-bc15-92b2431614e2.filesusr.com/ugd/542254_5e7ce4ca436749f79edee462fc395c5c.pdf?index=trueIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/62896714506.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_83c8df9e1bb14f9db4bbb02b6cba564d.pdf?index=trueIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_2c570c92b9b340b1ac7dfe6eb1cdd7e3.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_d37f536f838a4156a2076f12c01d1416.pdf?index=trueIn 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_off0000fab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 5460 bytes
SHA-256: bfa5b1593d56dc27cd01642a72044c77f45ed637ef334960a0455b1f7933eba1
font_01_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 10700 bytes
SHA-256: 9d795e5537d421df3c191f24b14b230cc2a9e66a9d110cffc1af07bb2f3fc6e3

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