Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1190314c61fa641…

MALICIOUS

PDF

35.6 KB Created: 2020-05-15 16:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: ff518cdecb2b2cf72b703dbb2a4af78a SHA-1: 63ba78e6068d631cdacf09ab28f5fa4ba5ffac80 SHA-256: b1190314c61fa64140eb3820716527d222dc59476eb3dc0b390ba21e2c8173eb
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to distribute malicious content. The document body contains text related to 'Hoover dam readworks answers' and is generated by wkhtmltopdf, suggesting a lure for educational content. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a mass external PDF link farm, indicating a likely malicious intent to redirect users to potentially harmful sites.

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://deercoveresort.com/uploads/1/3/0/6/130604147/130604147.html#hoover+dam+readworks+answers PDF link annotation
    • http://benandvee.com/uploads/1/3/0/4/130479210/6f16a2d088a7d6.pdfIn PDF document text
    • http://proasin.net/uploads/1/3/0/7/130738996/tezozeze.pdfIn PDF document text
    • http://sugarbeescookies.com/uploads/1/3/0/7/130739198/9a086d27.pdfIn PDF document text
    • http://complexsyrup.com/uploads/1/3/0/8/130873914/c6bf9.pdfIn PDF document text
    • http://wanted-jeans.com/uploads/1/3/0/7/130739062/sekazijegeropawarodu.pdfIn PDF document text
    • http://astopintime.net/uploads/1/3/1/4/131453485/8740776.pdfIn PDF document text
    • http://bemcapazaromaterapia.com/uploads/1/3/0/6/130603855/tusitarasizijel-jexig.pdfIn PDF document text
    • http://shannonhodgen.com/uploads/1/3/0/8/130874043/bd19464e211e826.pdfIn PDF document text
    • http://pawsibilities.org/uploads/1/3/1/1/131164506/4153944.pdfIn PDF document text
    • http://westcoastclassicshow.com/uploads/1/3/0/6/130639785/6360591.pdfIn PDF document text
    • http://henrydowning.net/uploads/1/3/0/5/130539696/zanimurexasawik.pdfIn PDF document text
    • http://congopapers.com/uploads/1/3/1/4/131406687/00b6e62.pdfIn PDF document text
    • http://aquasquirrel.com/uploads/1/3/0/8/130874049/rotosa.pdfIn PDF document text
    • http://ehneesa.com/uploads/1/3/0/8/130815664/degazilasap-vitasemope-laxikitatog-migasu.pdfIn PDF document text
    • http://theschoolstead.com/uploads/1/3/0/7/130775876/0a016722c.pdfIn PDF document text
    • http://pvoxxhelp.org/uploads/1/3/1/4/131483031/7616091.pdfIn PDF document text
    • http://hashtagpositivity.academy/uploads/1/3/0/5/130543667/warojafugoxi_zajivipip_maren_fupanagerezubu.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

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_off00006013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 10232 bytes
SHA-256: b5b800397a102817138d56fd2f9c1fe0d99853091ce5dc49f27388e9da731450

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