Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bcfb54f10fd13f…

MALICIOUS

PDF

81.4 KB Created: 2021-03-08 04:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 667a3fc2516d32cf76a7e0dc842f11f2 SHA-1: c9db45078092e4cb59c5697dec3b06d85f365ba6 SHA-256: 70bcfb54f10fd13fc7431933c12003163860738510204cfa6245d86c4e466634
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable domains or services like Weebly, suggesting an attempt to distribute phishing content or second-stage malware. The presence of a URL with a 'keyword' parameter indicates a potential phishing lure related to 'Lamborghini pre o 2020'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://midufefew.ru/award?keyword=lamborghini+pre%25C3%25A7o+2020 PDF link annotation
    • https://cdn.sqhk.co/kowukogifaw/ixjejeG/android_developer_accelerometer_tutorial.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/3727022.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/pedevivimejomomafow.pdfIn PDF document text
    • http://balifruit.com/676539941m29h1.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/2402738.pdfIn PDF document text
    • http://reduslim-official.website/python_django_tutorial3yjoj.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/machine_learning_models_for_classification_of_bgp_anomalies.pdfIn PDF document text
    • http://flowerport.shop/bosch_tassimo_vivy_2_user_manualmd20s.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/87637c.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/wamenegej-gafinovafinud.pdfIn PDF document text
    • http://yachts-4-sale.com/597395340524z2n8.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/cnifji9/rarity_of_blood_types.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/5030310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_e6e39f9ad8d74153b350485a402e626d.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_7a9b157cf94e4d2fa4db72d47d0d9d2c.pdf?index=trueIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_d7372c250e424843a8ebf15c90ecbbd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f157d73-597f-4442-8956-9d657edeb8f4/brookstone_bluetooth_speaker_big_blue_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16cac85-1007-4097-ae35-51b258234d85/rv_toilet_blade_seal_replacement.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_1e99184415ae4a29adcbd9a23c1fdbb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0570e145-333c-4424-a3bf-26afd1e2ac32/unit_4_electricity_and_magnetism_study_guide_answer_key.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_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5560 bytes
SHA-256: 16ec9bea1c7364f2ed5e90ee48cb9720a9c6768c38c7efffe524e111adb08c1e
font_01_sfnt_off00010847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10847 16108 bytes
SHA-256: 6e1820f609f9933423a93325e008991d496a23fbb69c300460bff7b4c1bd88dc