Malicious PDF — malware analysis report

Static analysis result for SHA-256 877c17fdd2192abe…

MALICIOUS

PDF

38.9 KB Created: 2020-03-24 21:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 1d20dc3b09e7179b47b593b14ac8814a SHA-1: ef4b6de688c5150ce73fcef60ff71e37479b1550 SHA-256: 877c17fdd2192abe62054bee907663d7c07fa754819c8fb9d1eb2c7723c8795f
96 Risk Score

Malware Insights

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

This PDF document contains a significant number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The document body, though partially corrupted, contains references to URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://shiying-cheng.com/uploads/1/3/0/5/130588964/130588964.html#sherlock+holmes+tv+show+cast+2017 PDF link annotation
    • http://cleoat50.org/uploads/1/3/0/9/130969888/1224775.pdfIn PDF document text
    • http://www.brandondmain.com/uploads/1/3/0/6/130620715/dogetenewav.pdfIn PDF document text
    • http://mx.rayannashopeforafrica.com/uploads/1/3/0/5/130588811/04c96.pdfIn PDF document text
    • http://room129grooming.com/uploads/1/3/0/5/130590233/4743129.pdfIn PDF document text
    • http://juvefc.club/uploads/1/3/0/5/130551364/zaxamoxiji.pdfIn PDF document text
    • http://visasdevisitante.com/uploads/1/3/1/3/131382430/f538a5c296d62c.pdfIn PDF document text
    • http://nakitahogans.com/uploads/1/3/0/6/130604054/lolawomazewuk.pdfIn PDF document text
    • http://luluchics.com/uploads/1/3/0/4/130435657/0b8014bba4.pdfIn PDF document text
    • http://shkola2-0.com/uploads/1/3/0/4/130489564/xokojevugajove.pdfIn PDF document text
    • http://5xchurchplanting.com/uploads/1/3/0/8/130874016/8075415.pdfIn PDF document text
    • http://iwantoutofokc.com/uploads/1/3/0/7/130740624/raxigiwutowuf.pdfIn PDF document text
    • http://noahsgiftsandgallery.com/uploads/1/3/0/5/130589223/zunowapen.pdfIn PDF document text
    • http://empressivelyyou.com/uploads/1/3/0/5/130590208/8665468.pdfIn PDF document text
    • http://stitcheduphawaii.com/uploads/1/3/0/7/130776134/pofiz.pdfIn PDF document text
    • http://stemhistorysa.com/uploads/1/3/0/7/130738752/tamufevex_jonanojerawidu_darop_baxewidatovak.pdfIn PDF document text
    • http://projectbyob.org/uploads/1/3/0/9/130969389/4546771.pdfIn PDF document text
    • http://jenniferwasmer.com/uploads/1/3/0/2/130272319/saroju_renulota.pdfIn PDF document text
    • http://registrodemaquinas.net/uploads/1/3/0/6/130640119/novudo_mulirelikagi_doxiwisexe.pdfIn PDF document text
    • http://www.redenexcbo.com/uploads/1/3/0/2/130289291/26235a.pdfIn PDF document text
    • http://www.annimuhlegg.com/uploads/1/3/0/8/130813134/taguwupepitom_lusit.pdfIn PDF document text
    • http://realme4u.com/uploads/1/3/0/3/130379292/3791428.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C03 8336 bytes
SHA-256: 7c5b877918db4a94f7f9a0ffb9a6e836b1de0ec291bcd7b7ca50fb1c68355ed9

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