Malicious PDF — malware analysis report

Static analysis result for SHA-256 b695aacba579dd21…

MALICIOUS

PDF

72.6 KB Created: 2021-06-01 06:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1af6cdada7981f7da3b0c956c1dbaf64 SHA-1: 5b2363cb431c7b7bb7b9299e413eab76f0549613 SHA-256: b695aacba579dd21dcaaaafcf970455f9300c48618fa9211da2cbb1a0a3715c5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, and ClamAV detects it as a phishing trojan. It contains a link farm pointing to various external URLs, including one that appears to be a lure for 'chocolate miniature dachshund puppies for sale pretoria'. The presence of numerous external links suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://smidgel.ru/pbw?utm_term=chocolate+miniature+dachshund+puppies+for+sale+pretoria PDF link annotation
    • https://ritesevegozuvij.weebly.com/uploads/1/3/1/6/131606822/e64c3751.pdfIn PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/bubovaboxaju-rifanonija-tosixozofow.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/6d8ebdffc.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/sifozigoxovaxiv.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/8466783.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/338919.pdfIn PDF document text
    • https://jokisutenewaj.weebly.com/uploads/1/3/1/4/131483229/wubojevinovuwaz.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/e185dc18-354e-4e84-b9f5-572f49fe6c52/fevaxamepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a654d60e-450f-40e3-91a7-93b8237e1a03/lenamuneluwuwisam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da84111-fe1b-4981-9ee1-30cf1e35d587/sql_interview_questions_and_answers_for_business_analyst.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c08db4-c610-4ad8-97ae-2df5a7a62bd2/twilight_saga_new_moon_full_movie_123movieshub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07502155-834f-4745-afd8-81b234b4e93f/chick_fil_a_menu_market_salad_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4a31aa-5b98-4667-a55c-6f21e2a6a21f/xukarono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812ef951-ac59-4ba4-86c3-203ff4d8d057/nazabilizodukosumezenabip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc49845-b948-43f5-8678-1bd80a83ca58/essential_university_physics_volume_1_global_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f25e1f2-00a1-47bb-b817-eeedf22b6cad/falujoxufuvab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc769958-d1df-4ee7-b811-534a3a30d5ea/40974391094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42d31b3-d16d-4240-ae52-fef5afd11361/fiddler_on_the_roof_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e44b70f-b611-4cbb-9553-c78ac3f49112/warcraft_chronicle_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad87d17-8947-41d3-8531-4c79ed4fc720/what_does_calling_someone_a_white_tiger_mean.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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5300 bytes
SHA-256: 6d03c7998a9e272bbe3ced21f66a5c9be208a62024608d0067a8437c53a3745d
font_01_sfnt_off0000ef21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF21 11000 bytes
SHA-256: e5dd93cb98b8ff36ff4fc072d2f44b93bc135e0b0b9fab26412ab9a736956f06