Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a24358ca3e1ef3…

MALICIOUS

PDF

83.8 KB Created: 2021-03-16 21:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f443a061f10d013954695638e058428b SHA-1: 0f732e9646f21a47502476a5af1e241d69a62d0f SHA-256: b7a24358ca3e1ef3a9bb6b92fe6548cf63d9170962fd5cb202cbf711e06c3629
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

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://jottigo.ru/wix?keyword=sniper+3d+hack+online+generator+without+survey PDF link annotation
    • http://luxomozuk.mypressonline.com/hp_easy_scan_not_working_mac_high_sierra.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/zatewejufopupe.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/22947328690.pdfIn PDF document text
    • http://hermidkovo.info/vision_based_autonomous_robot_navigationed4dp.pdfIn PDF document text
    • https://jabefebilinoke.weebly.com/uploads/1/3/0/7/130739415/d7bea6c.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/1272150.pdfIn PDF document text
    • http://floradoma.net/nerufexawusatknc9a.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/b73967c47c7a1.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/denasanipakibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_c6fbb959082f4f54aa91fa5bc962a1ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/984dc540-d393-4c86-b4fb-aadf87888eae/entry_level_interior_design_jobs_los_angeles.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_f22d90b89df94416a7d28ed8d73fc378.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_403c55b04f5b494fbbfa96e105c3e636.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_4f2899069a63464cb04cc69a2ce35f16.pdf?index=trueIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/7514735466.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_e91ba747dc7a4b96acdba3932eed980e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c351d0d5-1678-4622-8191-8875b0dff821/the_source_power_of_happy_thoughts_free_download.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_6a2bbfeb8385410aae7dd65a7e4a69b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e36e1d-5279-45e9-8218-c5600b517ff3/where_can_i_get_my_edenpure_heater_repair.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 5800 bytes
SHA-256: 380f499d40c809b884a3e18c3759cc6ae7267e074e555fab8f77dc52a9189b36
font_01_sfnt_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 11060 bytes
SHA-256: a8d34194f88e73815ed955e652d2bed00204fa3d169fc33c30942d8aef5f9718
font_02_sfnt_off0001338a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71