Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46090971b96451f…

MALICIOUS

PDF

62.6 KB Created: 2020-12-23 00:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 655804b152a4cbcc90db1f2fa6816ef8 SHA-1: 2cfd7cecbfef092ff84e74b38503eb277b208d85 SHA-256: b46090971b96451fd080bd958fe3cfd5f474137a24358e2730bf64c81b208998
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs that point to link farms hosted on disposable domains, with several redirecting to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these redirectors. No scripts were extracted, but the structure suggests a lure document designed to lead users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=topographic+maps+worksheet+8th+grade+pdf In PDF document text
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/nibakegabagexa.pdfIn PDF document text
    • https://kipunokazapalu.weebly.com/uploads/1/3/4/7/134774983/kaguxaliwudeda.pdfIn PDF document text
    • https://gifedoku.weebly.com/uploads/1/3/4/2/134234788/9f59b.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/wipagogoliwise_kokapusuta_roberizebelar.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/sesoverowufale_xidokogiwujiv.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/rixefadeberogo-lexun-fobififod.pdfIn PDF document text
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/5797629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f98ca404b659.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/8322fb71-db92-4a65-b71e-7d3e0c4521c2/pokemon_trainer_class_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/clarion_car_audio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc669b468612547ed83c202/t/5fca23949bc93d20d9b69072/1607082901717/kigufusurexipabifisususo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24e36ff-0627-4a93-b0b5-b7572d050c76/duraflame_dfs-550-11_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37900ec917750a3e8073f/t/5fc9a797856278751756ef6a/1607051159356/tiwutenuwaj.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_off0000b7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C6 5836 bytes
SHA-256: 0825b22408b025f1165675c41b0f0796f3fdd49d0ebed2e905cf93579f9dec00
font_01_sfnt_off0000cb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8D 10032 bytes
SHA-256: 6e185b0c45aead9abda74dc1ce8261e01ddb30e6491dcfb5a42d8ee690d698db

Open this report in the interactive analyzer, or submit your own file for analysis.