Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a6535baf63034…

MALICIOUS

PDF

80.8 KB Created: 2021-05-30 03:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7826ba1614f7fc5304e52dca3a5800b5 SHA-1: 47c1b846e4ab335fe4e1b3b8e90113217ee9dda4 SHA-256: d94a6535baf63034c0438461c5b39ca5746ad636e0457e1648877482c73f5150
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 ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the document's structure point towards a phishing or scam attempt, likely using the lure of VPN configuration to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=configurer+utorrent+avec+vpn+cyberghost PDF link annotation
    • https://sawepaxir.weebly.com/uploads/1/3/1/8/131858353/9ab9450d0b.pdfIn PDF document text
    • https://netavobedeve.weebly.com/uploads/1/3/0/7/130775758/towixozo.pdfIn PDF document text
    • https://suxasamivozafe.weebly.com/uploads/1/3/4/7/134705269/nifozobiwal.pdfIn PDF document text
    • https://zivumabozado.weebly.com/uploads/1/3/4/8/134858695/tewetapojov-foferinavuxetur.pdfIn PDF document text
    • https://wuwonerosetopux.weebly.com/uploads/1/3/1/6/131606808/bibijezibifas.pdfIn PDF document text
    • https://wevoforu.weebly.com/uploads/1/3/4/5/134591306/zuwotudelaxoja_xefek_beketekulabirax_dixaxapop.pdfIn PDF document text
    • https://xixiduduge.weebly.com/uploads/1/3/4/7/134713202/ritateladux.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://uploads.strikinglycdn.com/files/d9c1f8db-bc1b-4679-abc2-a60345fae635/marvel_comics_1000_creators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75348b66-6a4b-40ba-b749-74a494003499/72982499255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caeea0d8-f6c6-4450-b962-3984040059d9/does_xfinity_have_hi_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276fcd96-0cd9-4446-ab8b-f778a169114b/how_to_pronounce_gitanes_cigarettes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad254bdc-17c2-47df-b0f2-0c317aee2e11/gapiwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa5520c-bd9a-4390-a9aa-5e6ab808497c/troy_bilt_horse_xp_drive_belt_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c041071-e552-482f-b450-4428867c612f/the_good_wife_synopsis_korean_drama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4796fa8d-f9db-4884-97ed-cedf73aef9bb/xozamufinimizatija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3154d190-a916-4096-aa23-29cca9043718/72_nombres_de_dios_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a90aa2c-fe67-4a72-889b-db93a2b0d92a/how_to_pair_a_dell_wireless_mouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5376ce-ca2f-4c38-bbd3-7cec7e68d3cb/57084828591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55979961-065c-4ede-b0f4-fbbf11976055/guduwamisedase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a49399-b214-4746-a89b-180c388fd728/45813274487.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_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 5452 bytes
SHA-256: d38720587394f7b5c469e2aa028614809a24c9cecdf20128b05ffdf80222f17e
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 11660 bytes
SHA-256: 3003c27f5dccbd518b6ee2d7691975d849c42a12bdc210728d113f12bf5a36b9
font_02_sfnt_off0001262b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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