Malicious PDF — malware analysis report

Static analysis result for SHA-256 affb8f537c7eed0e…

MALICIOUS

PDF

35.1 KB Created: 2020-06-11 15:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 64aae4717ae6d47ce37f89b0e91b89f0 SHA-1: e0d99c7eadc484300f635bf1317ead936e41ec4d SHA-256: affb8f537c7eed0e8ffa1d1d61805e5864bcb2c557243d4bafa1d008b2704d82
96 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The PDF_SEO_LINK_FARM heuristic firing indicates a mass of external PDF links, with the dominant host being ns2.graingercountytomatofestival.com. The embedded URLs are likely part of this link farm, aiming to direct users to potentially harmful content or further stages of an attack. No scripts were extracted from this sample.

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://thehayescompany.org/uploads/1/3/0/5/130543466/130543466.html#compactlogix+selection+guide PDF link annotation
    • http://ns2.graingercountytomatofestival.com/uploads/1/3/0/5/130539726/farubugusixire-gedez.pdfIn PDF document text
    • http://culturebridge.com.au/uploads/1/3/1/1/131164004/rejufemilela-javufiwidiki.pdfIn PDF document text
    • http://aeronave.com.br/uploads/1/3/0/6/130640214/3dc6f6684dad.pdfIn PDF document text
    • http://russoasset.com/uploads/1/3/0/2/130291827/34b8df77.pdfIn PDF document text
    • http://webdisk.mikeuziel.com/uploads/1/3/1/8/131871493/koxal.pdfIn PDF document text
    • http://412cityrentals.com/uploads/1/3/1/8/131871814/1c933d.pdfIn PDF document text
    • http://dopeslips.com/uploads/1/3/0/5/130589252/babifiritivapit.pdfIn PDF document text
    • http://photoboothrentalssanjose.com/uploads/1/3/1/3/131379296/xozozutevoda.pdfIn PDF document text
    • http://francescocamuglia.com/uploads/1/3/0/2/130288594/lituxojufenek.pdfIn PDF document text
    • http://74-123-72-38.mgwnet.com/uploads/1/3/0/5/130590521/zunasofenalud_ruzowow.pdfIn PDF document text
    • http://detailinggreensboro.com/uploads/1/3/1/3/131380612/peretisukamoru.pdfIn PDF document text
    • http://monroecountydems.org/uploads/1/3/1/4/131406684/lixobovexevobub_xekidefeguvuki.pdfIn PDF document text
    • http://twincitieselectricmn.com/uploads/1/3/1/8/131871871/5277934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zomobok.files.wordpress.com/2020/06/83979684497.pdfIn PDF document text
    • https://vapijusiv.files.wordpress.com/2020/06/biteri.pdfIn PDF document text
    • https://dakemevodugu.files.wordpress.com/2020/06/wobetutik.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 3

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_off00005df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF1 10140 bytes
SHA-256: beb1444ec9ae6059f14beb06883ecd807e0975d1b7632493eb4b5f6b13598fbf

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