Malicious PDF — malware analysis report

Static analysis result for SHA-256 2015a3415f7a82ef…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 10:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c8faf07fc194a0a0d3a4ec36ce9a7c29 SHA-1: 233bd13756ffd31230003d47943d09ff4feaf569 SHA-256: 2015a3415f7a82efef8b3b37af088c5689a71c56b6a2eed14d98516781b9b283
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The presence of a specific URL, 'https://ponafet.ru/strik?utm_term=freightliner+service+link+online', indicates a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://ponafet.ru/strik?utm_term=freightliner+service+link+online PDF link annotation
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/714b6fd.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/judaseruju-vejinapapu-zuladopu.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/16049582821.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/imovie_trailer_templates_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_6008abbc12652.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_6007ac1b2ec89.pdfIn PDF document text
    • https://wozovogunetip.weebly.com/uploads/1/3/5/3/135396590/7b7b5812.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/what_states_are_happy_endings_legal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485454/normal_5ffa53b1120ee.pdfIn PDF document text
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/e058eb7327.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/xelapurukugasefur.pdfIn PDF document text
    • http://lusatesarisabag.iblogger.org/cbse_class_10_english_language_and_literature_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489615/normal_60109bad192bd.pdfIn PDF document text
    • https://ketowijogi.weebly.com/uploads/1/3/5/9/135985413/jevipuwuxikozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fe32cbfe7a34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87135313-049f-4e57-b779-43be76952211/6718536270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeac2209-c854-4b7f-b25a-8e15c2fafb4b/how_to_do_conditional_probability_in_r.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_22386c59fa1143d2a1ee1d9dce17fb8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ec068c-8c6d-4f4e-9563-645a7a0af0ef/zoroguguximaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd42e9e7-d908-48ef-ac5e-ade9901e5bcc/hoover_pro_pet_carpet_cleaner.pdfIn PDF document text
    • http://gedamodeges.epizy.com/vaughan_bassett_furniture_company_contact_information.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/senuxifujizisugafo.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/what_battery_does_a_craftsman_riding_mower_take.pdfIn PDF document text
    • http://pawuzax.onlinewebshop.net/2507821789.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a99b3423abca4caaad60f3b8d9558a41.pdf?index=trueIn PDF document text
    • http://reronagut.epizy.com/yumetourou_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fcee79a-5e0d-41b4-8ccc-28246bb980b9/54136829070.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_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 4932 bytes
SHA-256: 80d9009581030c82fccda38c5025bd70c50052571ef27c70bb7c16b84fea9276
font_01_sfnt_off0001034e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 10568 bytes
SHA-256: dd31d1c9527841d02539f6e11890b5983be73dd077b1ffa0a316df6c5366cfe1