Malicious PDF — malware analysis report

Static analysis result for SHA-256 303f022172fb3f05…

MALICIOUS

PDF

64.2 KB Created: 2020-06-10 08:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 9642768110cff6f1eb33b7b7301f0feb SHA-1: e93dd88b3660538f3e104726e2794f1f9633ddec SHA-256: 303f022172fb3f05a6c0a60069ae15886558e72d40c0baec5f6ae4e85d40b98e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains a Portuguese phrase related to a scientific research project, likely a lure. The primary heuristic indicates a link farm, suggesting the document's purpose is to drive traffic to a network of potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://adsl-63-204-18-26.benefitplans.org/uploads/1/3/0/9/130969146/130969146.html#introdu%25C3%25A7%25C3%25A3o+ao+projeto+de+pesquisa+cient%25C3%25ADfica+franz+victor+rudio+pdf PDF link annotation
    • http://clearbrookorchestra.org/uploads/1/3/0/5/130544132/nuxuruzem-wodewuz-wugegejad.pdfIn PDF document text
    • http://3x6.undesirable.us/uploads/1/3/1/4/131438348/vopagi_keweg.pdfIn PDF document text
    • http://yellowsharklogistics.com/uploads/1/3/1/4/131437216/863667.pdfIn PDF document text
    • http://cpanel.lizzieslowe.com/uploads/1/3/1/0/131069777/2712518.pdfIn PDF document text
    • http://mail.teamsalesvictoria.com/uploads/1/3/0/2/130288326/7452804.pdfIn PDF document text
    • http://energise.org.uk/uploads/1/3/1/6/131606953/114874.pdfIn PDF document text
    • http://294at80.com/uploads/1/3/0/4/130476519/jufajurexejo.pdfIn PDF document text
    • http://thesageoftime.com/uploads/1/3/0/4/130436482/c35ab2458.pdfIn PDF document text
    • http://galianotest.northwesternmemorial.org/uploads/1/3/0/6/130621613/solejudaloke_xoxizesexelawun_rufuro_wogaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sojobumowoz.files.wordpress.com/2020/06/luruvev.pdfIn PDF document text
    • https://muwafinatub.files.wordpress.com/2020/06/rovez.pdfIn PDF document text
    • https://gapepuzowafu.files.wordpress.com/2020/06/pixawinejevewafugubef.pdfIn PDF document text
    • https://nolegibi.files.wordpress.com/2020/06/senamafekux.pdfIn PDF document text
    • https://tepazevi.files.wordpress.com/2020/06/40361944239.pdfIn PDF document text
    • https://posuwobi.files.wordpress.com/2020/06/rusijasupejevupiz.pdfIn PDF document text
    • https://fowetekiger.files.wordpress.com/2020/06/26309693585.pdfIn PDF document text
    • https://detekekud.files.wordpress.com/2020/06/wuvinotegelijafib.pdfIn PDF document text
    • https://nufedofiza.files.wordpress.com/2020/06/66993117089.pdfIn PDF document text
    • https://fujezarek.files.wordpress.com/2020/06/rodimujofizivolasijazuwo.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

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_off0000c4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CE 15236 bytes
SHA-256: cafec63bf5d6ca7127407cb6658f0962cfeb1aadd9af9b6e7e498d6209cb1490

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