Malicious PDF — malware analysis report

Static analysis result for SHA-256 472b01b7f32101cc…

MALICIOUS

PDF

96.4 KB Created: 2021-05-12 21:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 906dba6dbd94e262953b3041dc1cdf97 SHA-1: ecbafaeca02500bbe4e0f782f2aadb6033bda570 SHA-256: 472b01b7f32101cc05042782e51a2327780f62c7be736debc6d3a156b9cabb42
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing lure related to search terms.

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://vilenefex.ru/strik?utm_term=husqvarna+445+chainsaw+oiler+not+working PDF link annotation
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/fupunabobewawek_xizetisupomevu.pdfIn PDF document text
    • http://copyright-services-us.com/519456170l1xtp.pdfIn PDF document text
    • https://logugutixolug.weebly.com/uploads/1/3/5/3/135393325/kojelepipowax_bajagini.pdfIn PDF document text
    • http://badge-verification-center.com/libro_aprende_ingles_en_7_diaspwwz5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_605b0e3e0d4a1.pdfIn PDF document text
    • http://virona.org/free_psd_flyer_poster_mockup_templateswyetw.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/2704200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_603cc8e606528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6013925fa561b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_604139d270a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fe9d2bcd5d86.pdfIn PDF document text
    • http://dontbeshy.xyz/closed_captioning_apps_for_androide1x0j.pdfIn PDF document text
    • http://gefomovunodibiw.iblogger.org/annotating_text_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazupixuwup.rf.gd/mupagome.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_be0f0ee088bd4fb0ac45a278ceceaef5.pdf?index=trueIn PDF document text
    • http://vifijaxixupajul.epizy.com/alliance_bank_credit_card_application_form.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_5aa77aa7cec84d59b2c3376560eec485.pdf?index=trueIn PDF document text
    • http://zerujafulo.rf.gd/67799687706.pdfIn PDF document text
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_b2fb713b03b54f5987e7104988f0ff16.pdf?index=trueIn PDF document text
    • http://sixosotonipo.epizy.com/60981274748.pdfIn PDF document text
    • http://rubujizuz.epizy.com/alessia_cara_stay_mp4.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_off000139ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EC 5576 bytes
SHA-256: 34ad0259c1f0507313ce8ee7329c6db79b55b81f6e6c472aeddf6c99e36e9380
font_01_sfnt_off00014cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFF 10804 bytes
SHA-256: 52b237ec77da8f2aa36c71372e65fa669f633f013a3a4aaa455bd959132750a8

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