Malicious PDF — malware analysis report

Static analysis result for SHA-256 103a0d0aae12ce6d…

MALICIOUS

PDF

64.4 KB Created: 2020-10-01 04:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 172ab28a61207eefae42663aa0e3e390 SHA-1: 7e5fdd2f8e4e9ce75ebba0340528999170fec202 SHA-256: 103a0d0aae12ce6d9a3d2caa0f1cf517e9c7ce0d8c84b9297987ab02b84a62bb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a link farm, directing users to numerous external websites, including a known malicious redirector. The ML classifier strongly indicated maliciousness, and the embedded links are hosted on disposable domains, suggesting an attempt to distribute malware or phishing content. The document's primary purpose appears to be redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=historia+da+igreja+anglicana+pdf In PDF document text
    • http://zujij.kupetspinkinvitational.com/uploads/1/3/1/4/131483154/meridalegu.pdfIn PDF document text
    • http://files.demo.famhealth.com/uploads/1/3/0/9/130969129/zovojanunexi_sasobakekedexob_rutesedod.pdfIn PDF document text
    • http://pazuxitas.gettreschic.com/uploads/1/3/0/8/130874012/lurewuxaz-jekitaravifabik.pdfIn PDF document text
    • http://dabojon.windhavenfarm.org/uploads/1/3/0/9/130969932/zomekegipir_sopegik_viwojij.pdfIn PDF document text
    • http://malit.alabamaheritage.com/uploads/1/3/1/4/131437605/105b4ba8309.pdfIn PDF document text
    • http://murami.deaconmichel.com/uploads/1/3/2/6/132682124/9499322.pdfIn PDF document text
    • http://files.whitelighteventsja.com/uploads/1/3/2/7/132740204/ruzitiwiw.pdfIn PDF document text
    • https://site-1038743.mozfiles.com/files/1038743/24085777937.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/84395373980.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/vunepugalodolex.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/viwogowodiwekegexifap.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/boteraronokolati.pdfIn PDF document text
    • http://files.davescucina.com/uploads/1/3/1/3/131384335/zupesurisemide.pdfIn PDF document text
    • http://puwewob.trinityhouseentertainmentinc.com/uploads/1/3/2/6/132696147/27753113d6ffe85.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
    • 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_off0000b202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 5148 bytes
SHA-256: 83bdab02666f4d1035d39fc83ee45206f55c364302d34f3d34948d70147902a2
font_01_sfnt_off0000c393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC393 10184 bytes
SHA-256: 043671e6313ee0f7b57ffc82a3890140130a3cfdb58ed858eb45f913bdf97912
font_02_sfnt_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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