Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86848f117f51bc4…

MALICIOUS

PDF

69.3 KB Created: 2020-12-22 03:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 10b4c89531c6ff5d3d3a23b64c4fe295 SHA-1: 9f0299fc71416058f57ea8692328138c7595470c SHA-256: c86848f117f51bc462599bbb06f56f51c1ea12ec3739a67cc5663e632b1f6542
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a site that appears to be part of an SEO manipulation or link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URI heuristics suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffnew.ru/aws?utm_term=are+bamboo+sheets+good+for+night+sweats PDF link annotation
    • https://xapinetevum.weebly.com/uploads/1/3/4/3/134330578/916786e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f89c2494f220.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/repapulupo-givuv.pdfIn PDF document text
    • https://lepomanorep.weebly.com/uploads/1/3/4/8/134856804/9548819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fcf6d253cae1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc13a23affbf90a66eca3c4/t/5fc9add2196a600d3c2e6ca8/1607052755885/gigotobapoxavax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fd580a-4dac-41e4-a295-f7ad86a4866c/46189729139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6386e581-d56e-4104-b11c-94d05cbc82a6/ffxiv_baldesion_arsenal_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b3a9ed-05be-4095-9364-49cb3431cfa1/clever_robotic_team_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0505e539-2d0a-4a30-8555-c073a71b2637/pegozuratexedabefinaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21587cf1-fb9b-48a3-a18c-cdfd96a95faa/fusion_360_tutorials_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2953ad26ff1194f7e808d/t/5fcf6a8a7cc0b10a0ad13a5d/1607428747454/fabutugojotilorarakeko.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fddcadd7514fb3b7635d4f9/1608370910235/2019_gina_asthma_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a7f6b9-9d03-490c-9a0b-d8c43f019d75/download_apk_ufc_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff8900f7af3919d3fc9c/1606221706259/franke_kitchen_faucets_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0918184-4b46-4336-b254-460dd8dca07b/54153551657.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72365a4d75e5252f326fb/t/5fceb456e985de26310010fd/1607382106059/how_to_mud_and_tape_sheetrock_corners.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_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 5512 bytes
SHA-256: b797cd0b4ec9c362e723c9b039cebb41e658a1664e428ae503f2f96767e583c2
font_01_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 10380 bytes
SHA-256: d228dd4c8941fa9f721f78e2579ff0e9e461e85058bbbe12d67bf0c7132ac67f

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