Malicious PDF — malware analysis report

Static analysis result for SHA-256 064ca1b196eb5423…

MALICIOUS

PDF

37.5 KB Created: 2020-11-07 16:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dd433dd725613ad2467680e6fc204b19 SHA-1: d9bc97183743a23e9d12a364d48922c127da86db SHA-256: 064ca1b196eb542343778ffa45568a1733214f01adc61157c93ff55c191c88a3
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=spacemaker+xl1800+troubleshooting PDF link annotation
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/955e53fbbe.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/jimik-zisefi-lupuso-bubudabux.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/5010804.pdfIn PDF document text
    • https://vagepawesiger.weebly.com/uploads/1/3/4/5/134516176/pagugukoxorexapemu.pdfIn PDF document text
    • https://xitawameduzip.weebly.com/uploads/1/3/4/5/134511141/b5feb86d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_5f9e44f7e51ef.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/1103303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://komipisi.files.wordpress.com/2020/11/45443452492.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://gozodusi.files.wordpress.com/2020/11/pipasogasepepudutamigopob.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://s3.amazonaws.com/muguroviv/oracion_a_la_sangre_de_cristo_por_mi_hijos.pdfIn PDF document text
    • https://xejuritumar.files.wordpress.com/2020/11/zizujesepurizeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/kifoge.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_off00004ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED4 6108 bytes
SHA-256: c07d634ff4f8a837da1161f2ed84f8ca1426198881c8c8e89a0c176b98957f7d
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 11256 bytes
SHA-256: 279a9432125d0bc6824020b6db44ab8d79265752343eb8e9e9964d00eed42d42