Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f4b70d3a59a4c2…

MALICIOUS

PDF

75.9 KB Created: 2021-06-01 06:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5ab8eaf839e3097ae00b42a02ad4fe13 SHA-1: b852107accbb0fe41a65a444385bff4fe0d6bde6 SHA-256: 46f4b70d3a59a4c2b216be0cd7b0e3bc848a907f96380a624cc5860ef0d53650
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, and includes a URL with a 'utm_term' parameter suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://philabc.ru/pbw?utm_term=unblocked+games+castle+wars PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4454045/normal_60b001e2138b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5fe4cef666c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_606330fd0791a.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/fufezajokulozi_domal_lubane_digutapilemi.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/a85f51a.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/4501702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_6018cb89cec73.pdfIn PDF document text
    • https://wadotadu.weebly.com/uploads/1/3/4/6/134633645/zilozefob.pdfIn PDF document text
    • https://xaxomawiso.weebly.com/uploads/1/3/5/3/135329970/7761416.pdfIn PDF document text
    • https://vogifidawavuda.weebly.com/uploads/1/3/1/6/131636702/lavenaru-lobunavilogodi.pdfIn PDF document text
    • https://bozetefaz.weebly.com/uploads/1/3/4/7/134733050/ribukida-reponamok-lotafaxofofurib.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/98ef2b0a-3d3d-48cf-909f-4b87c2ea1c14/lomezateronezututewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a46d5b0-deb5-437e-b108-f3e7a811c830/what_was_the_anglo_saxon_lifestyle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70ec489-204b-4f66-8a93-0b5d6dd0fa21/what_is_data_warehousing_concepts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fc84f9-0e09-4e62-b784-c9cb253feec3/50246020461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e0b708-c7b6-44cf-bdeb-c4bba9162c37/mezuteroweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330b473a-c5fd-4cd8-9651-826a27e5e631/jam_thrill_duo_speaker_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fd71ae-905c-4cd5-b1c8-6768f02599c3/beats_3_solo_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a30a12d-4d53-4a42-92d6-88809c87a107/hp_officejet_pro_6500a_plus_printhead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0169f0-63af-4eff-9a9d-528056983b36/cours_excel_fonction_recherche.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487d8ebb-8da0-4cc8-bf7b-9cd8c757838b/percy_jackson_and_the_battle_of_the_labyrinth_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e4dd61-2afb-4b33-8632-5b9d1ae09d7f/35724052984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5080b3-ea26-44dc-9aa2-d0795fab8eef/lidamawexarofidovo.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_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 5544 bytes
SHA-256: 74a690a0400c87f2fdd4ac78211cd997f95ad54c70b07826c9e5905c4bd983d5
font_01_sfnt_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 10780 bytes
SHA-256: 33ddfb8b1c3715a327b8b1256cab0f1c8b422b0ca836a13d600ccf808b2dae34

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