Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd14583caebe57ce…

MALICIOUS

PDF

75.4 KB Created: 2021-05-31 23:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6b0309bba712d8ae24979fd6c32c84b1 SHA-1: 26b39793c60197403a39a84ebb36eac13fd36b7d SHA-256: dd14583caebe57cebfe071d1551bffc54cbc91d57fb50f257cc71a8c9570c919
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 content or phishing sites. 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 external links are indicative of an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://allytemp.ru/pbw?utm_term=glencoe+physical+science+chapter+18+review+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379626/normal_6054d07cd47e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6044d80d8bf30.pdfIn PDF document text
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/8482696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_60396ab0393e1.pdfIn PDF document text
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/larubawozu_juwifofovo_luxujisikuvafas.pdfIn PDF document text
    • https://zufavaxevonek.weebly.com/uploads/1/3/0/9/130969036/8807084.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/ec0c5184f4.pdfIn PDF document text
    • https://nunuwipan.weebly.com/uploads/1/3/6/0/136002942/e1ea85f4b34.pdfIn PDF document text
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/xikum.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/3b239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_606c894339a6d.pdfIn PDF document text
    • https://jibeguviju.weebly.com/uploads/1/3/4/7/134723477/pezokigemekife.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/siluzinuvowe.pdfIn PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/jufomumevir.pdfIn PDF document text
    • https://narivuwejuw.weebly.com/uploads/1/3/5/3/135310919/vitugumidi-sujafobumiruda.pdfIn PDF document text
    • https://zuxusesomopekem.weebly.com/uploads/1/3/5/3/135305840/2104028.pdfIn PDF document text
    • https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/3917070.pdfIn PDF document text
    • https://wumikedamuzu.weebly.com/uploads/1/3/4/3/134324885/1617126.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/e27c45cb-6ef8-475a-913e-78b0024b9502/what_does_1_tablet_po_daily_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a281ad-0b32-4ea3-abb6-cb8a02ea53e5/lewukadatikofagupifijin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c66be6-6479-42b8-8b17-9f2a52345ab4/9.snf_kimya_konu_anlatm_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d20e257-bc47-49e7-9be7-920d29cdc1a4/kinetic_and_potential_energy_problems_with_solutions.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_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 5552 bytes
SHA-256: 2fc2b9a9451ac1a5da0fbacd97f1ae38dd866e8f4ecfeeb0aadebb8f12141f1d
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 10352 bytes
SHA-256: 5ced8255e05d1a30f8f8df406f7ce8e3758dcf90b8c97aa92e21b4e61aef91a6