Malicious PDF — malware analysis report

Static analysis result for SHA-256 e070f221d0a644c0…

MALICIOUS

PDF

78.8 KB Created: 2021-05-19 18:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0658483edbedf2e79dfee24918b7fb9b SHA-1: 107f31cad90e1891c28b21081276b215adc18ace SHA-256: e070f221d0a644c0d96904dabb09c125a46621078af9c93bc297e7d9922a99ee
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/strik?utm_term=best+baby+bouncer+and+swing+combo PDF link annotation
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/voxorovok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_6029f7c558a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_6021859eaf8f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fc5a951495e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_606e312e6dde7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_5fefdce6843be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5feafe2243f6e.pdfIn PDF document text
    • https://gogijufiwadika.weebly.com/uploads/1/3/4/5/134581681/23bc2a2408e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5fe62942d1492.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/c1496bbb-8936-4947-97a0-0807c491da91/9766808274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02dc634d-a843-4ee5-9662-bab837dc49e0/whistler_inspection_camera_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbaa2e15-1beb-4e87-a53a-82dfb81a634a/zebra_gk420d_driver_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7cd131b-15b5-4407-96c4-68f77f7f31db/rafts_to_tom_sawyer_island_disneyland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2876c9f5-71ea-4ad0-9986-8913b1fd2978/karcher_power_washer_wand_and_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d77ec0c-feea-47c2-8432-4c279b425b67/best_resistance_bands_uk_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721761a8-051e-4d8c-9faa-12d915288568/58742565799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4db4e4a-f749-45b4-9993-e4fd57b7bc2d/guxifupizamexiwamakiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e9f83d-eb87-46af-86b3-ccc5434daa90/does_fruit_and_vegetables_make_you_fat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17566bf-3f58-4601-8de4-b975426e10f0/dexifizofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa643be3-014d-4b6c-b288-40e2cd5dbb39/siganoparoraja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc44792e-abf8-4af2-ad02-233fa6dba1fd/spring_mvc_tutorial_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714ae9aa-a5e1-41e1-b7b8-837776a408ac/modabusimakolaxob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef8d67a-4301-47ed-8cfb-e3944253e132/oakley_jawbone_original_vs_replica.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_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 5612 bytes
SHA-256: 3f0056bc2031c04a0fc226a88f6bf38e9fc20162cc72a105d224076ce8b375fa
font_01_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 10852 bytes
SHA-256: e285691483acc32b0303f632ccd41d354182c1a8de03e702430eff9af546576d