Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc94fa4bde24f3a…

MALICIOUS

PDF

42.1 KB Created: 2020-04-05 07:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: e56f8af38128466018ec5d4cbe0c1f2a SHA-1: 1faaf48e55e84c798e55721f6c651613fc7d099b SHA-256: 6dc94fa4bde24f3ac7bdd559563785376b749634d8eface4e00f8af86d1e8561
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which appear to be SEO-driven content farms. The primary URL, http://rapidpermitreviewhawaii.com/uploads/1/3/0/6/130639720/130639720.html#conversion+degree+fahrenheit+to+celsius+formula, suggests a lure to a page discussing a conversion formula, likely a pretext to direct users to malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of 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://rapidpermitreviewhawaii.com/uploads/1/3/0/6/130639720/130639720.html#conversion+degree+fahrenheit+to+celsius+formula PDF link annotation
    • http://c2kids.net/uploads/1/3/0/8/130874115/57adc36c.pdfIn PDF document text
    • http://kislayapathak.com/uploads/1/3/1/3/131381658/4819342.pdfIn PDF document text
    • http://loriandlou.com/uploads/1/3/0/6/130604417/xeluraja.pdfIn PDF document text
    • http://myvegansister.com/uploads/1/3/0/5/130551006/dekobi_pavaged.pdfIn PDF document text
    • http://mzansinewsonline.com/uploads/1/3/0/5/130588922/1400305.pdfIn PDF document text
    • http://pontotocministorage.com/uploads/1/3/0/3/130379070/boluroxatotejil_fapuguxe.pdfIn PDF document text
    • http://mail2.ladescoinc.com/uploads/1/3/1/0/131070866/ruxirip.pdfIn PDF document text
    • http://fandomsasawayoflife.com/uploads/1/3/0/5/130546645/nulufur.pdfIn PDF document text
    • http://storybrooksentertainment.com/uploads/1/3/0/7/130740624/vitud_nexodijujuxis_viwimezasigum_zutuduwenijom.pdfIn PDF document text
    • http://aassfl.com/uploads/1/3/0/4/130483140/wesosilizogemafosid.pdfIn PDF document text
    • http://pastorjustindean.com/uploads/1/3/0/9/130969212/4075405.pdfIn PDF document text
    • http://dealmakr.org/uploads/1/3/1/4/131408203/wugigitibake.pdfIn PDF document text
    • http://meridian.group/uploads/1/3/1/3/131379402/pubadakege-kiralawomewemuj-bokosulolupi.pdfIn PDF document text
    • http://brandtechvisual.com/uploads/1/3/0/4/130483386/53fe41e1.pdfIn PDF document text
    • http://sharingthejourney.me/uploads/1/3/0/5/130545365/212a0f5eb6a9c24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F00 8504 bytes
SHA-256: 2ac6507758572e5a335a2824163c10def8e9e6a21b3d0cd019fdbcf9446f6562
font_01_sfnt_off00008faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAA 2604 bytes
SHA-256: 83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe

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