Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f12a1317157cd0…

MALICIOUS

PDF

42.4 KB Created: 2020-03-08 05:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8caa099204562f166a577f2f694d1d0b SHA-1: 0f65d54a03b1fdd521782f200a7affb0d7249428 SHA-256: c1f12a1317157cd0f097fff5672cbb42f93eaa843ef3869371ece3c225d51cc6
104 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, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm designed to manipulate search engine results or to host a collection of malicious documents. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. No scripts were extracted from this sample, limiting the ability to determine the exact payload or execution method.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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-63-204-18-53.benefitplans.org/uploads/1/3/0/5/130539129/130539129.html#compare+monocot+root+and+dicot+root PDF link annotation
    • http://gmichaela.com/uploads/1/3/0/6/130604363/2741212.pdfIn PDF document text
    • http://zumbawithdenisenyc.com/uploads/1/3/0/5/130551181/a4d191d3.pdfIn PDF document text
    • http://chalkidiki-villas.com/uploads/1/3/0/9/130969940/vagoxuxufogeramitej.pdfIn PDF document text
    • http://casadellaluna.com/uploads/1/3/0/6/130621634/zijajoxo.pdfIn PDF document text
    • http://carrotmeetscookie.com/uploads/1/3/0/5/130589249/zadub-kuviludizo-jomemudubuti-berenamemapexu.pdfIn PDF document text
    • http://www.marciekochdesigns.com/uploads/1/3/0/3/130312916/3aa36cd7b.pdfIn PDF document text
    • http://victoriastephens.net/uploads/1/3/0/2/130288416/0fc102c96.pdfIn PDF document text
    • http://vipschoolofcosmetology.com/uploads/1/3/0/7/130775376/69696.pdfIn PDF document text
    • http://drinkbelle.com/uploads/1/3/0/5/130590334/f30ada53.pdfIn PDF document text
    • http://naughtonsandblastinggalway.com/uploads/1/3/0/7/130739747/tojuvedetolubu.pdfIn PDF document text
    • http://nelsonmassage.com/uploads/1/3/0/4/130435500/399c48bb9c0807.pdfIn PDF document text
    • http://gypsydenisse.com/uploads/1/3/0/5/130539899/d95aa3d70.pdfIn PDF document text
    • http://shutterque404.com/uploads/1/3/0/8/130873758/8956672.pdfIn PDF document text
    • http://www.plantdrpeter.com/uploads/1/3/0/2/130272606/tolutaminimewu.pdfIn PDF document text
    • http://www.chescrafty.com/uploads/1/3/0/5/130590217/minumujoku.pdfIn PDF document text
    • http://thegreetingcardcompany.com/uploads/1/3/0/5/130543188/zagaro_fajavenodawik.pdfIn PDF document text
    • http://teamfunseattle.net/uploads/1/3/0/6/130603724/1efbda8ab.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_off00007a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 8816 bytes
SHA-256: 8a560855e0b533dde6a334b6db6bbc6c61a4de0c39efc7b7aa44355645dfe1cf

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