Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6141df0e79280f…

MALICIOUS

PDF

112.3 KB Created: 2021-04-11 08:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8fc3e7424d51977ba1ad2eb51649fca6 SHA-1: 2845b8df14928752de1e188fc97f4ad44c817cce SHA-256: 0d6141df0e79280f0aa17f881c8818e38fc1d60a4aa1aff1a9429146f5e80bff
206 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to be a lure, possibly a fake manual, to encourage clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ponafet.ru/strik?utm_term=sportdog+brand%25C2%25AE+nobark+sbc-8+bark+control+collar+manual PDF link annotation
    • http://lazokiwumemo.mygamesonline.org/durod.pdfIn PDF document text
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/1684954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_606ce6290db36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5ff13d71d06ee.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/1753375.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/28501726932.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/vavidibiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_5fe856f15389b.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/sokop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_600dba11acf1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_178c000053644d118d4035afedb9051a.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_2656186f7d794cefb5611d81c489214c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/398bd0ba-c02d-4565-b287-46fabfc13ab5/46649017722.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_b4d54c6084ef455aac1fc87ccdddb9a3.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_f9624e3d8ca84de3a1b7f54082cb4a32.pdf?index=trueIn PDF document text
    • http://nubirumoxid.onlinewebshop.net/massachusetts_durable_power_of_attorney_form.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_c6ab7024079b45de9aa5be693295f371.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_dd1837e3a82b470698467a8e7933c89e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fcf60e6-0487-4be4-ab7e-0bd8a4185ee2/2019261417.pdfIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_a7d5a18e92ad474cb56d4181efe95bd2.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_47db720e33fe4fa79011300b7da9b95a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c567e4ce-4204-48b7-ad1e-c16352a8e32d/what_size_tires_for_2005_jeep_grand_cherokee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20abd36-835e-407a-ab2e-901669ef4930/siruwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e143fee-5a76-4881-b812-7816cfb8ef42/how_to_disable_viper_car_alarm_permanently.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/what_are_the_duties_of_a_preschool_teacher_assistant.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_off0001730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1730A 6172 bytes
SHA-256: dbc0435b176d72065d452da4d73f29d72f636ad25f1dd171e67ff61a8aa0810f
font_01_sfnt_off000187ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187FF 11784 bytes
SHA-256: 4f3b1638250f7f625f78f1965241a7fab9890b6407b7d55441267ffc173793b1