Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b217ffd8e21725b…

MALICIOUS

PDF

31.0 KB Created: 2020-03-13 21:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 750226a851f94d9c6fc96feb2c0b93ac SHA-1: 2210eae32deb6653f546414bcb787ab493038153 SHA-256: 7b217ffd8e21725b74622a0e0c12399a205d5d68d4f1e50dae088f200912cc34
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a network of websites, likely for malicious purposes such as hosting further exploits or phishing content. No scripts were extracted, but the extensive linking suggests a coordinated effort to distribute malicious content or manipulate search engine results.

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://carlosdia.com/uploads/1/3/0/2/130287866/130287866.html#checkpoint+firewall+4800+datasheet
    • http://www.playgroundwod.com/uploads/1/3/0/5/130588151/3830837.pdf
    • http://valleyofhemp.com/uploads/1/3/0/5/130551019/metifizuxeleven.pdf
    • http://canterburynorthwestern.org/uploads/1/3/0/4/130483070/junadaduka.pdf
    • http://learnabundance.com/uploads/1/3/0/5/130541904/fabuxu_fajenilugo_rujef.pdf
    • http://www.gps-properties.co.uk/uploads/1/3/0/7/130776266/xomub-vaxepup.pdf
    • http://djsamara.com/uploads/1/3/0/4/130436068/ad007da51ba01.pdf
    • http://sowsncows.com/uploads/1/3/0/3/130313105/4510266.pdf
    • http://elevatetutoring.com/uploads/1/3/0/7/130740533/e25d6276.pdf
    • http://www.lauriamusic.com/uploads/1/3/0/6/130639934/54317.pdf
    • http://thermalexchangeservice.info/uploads/1/3/0/7/130775252/pekas-lanurafadit-zawabe-xananigar.pdf
    • http://newsolutionsit.com/uploads/1/3/0/6/130621952/f53572ed9f5c.pdf
    • http://nerdygoatbotanicals.com/uploads/1/3/0/6/130604422/nadutewog.pdf
    • http://jkstore24.com/uploads/1/3/0/2/130289166/nupef_teruzi_wekelopisase.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052bf.bin
89a25eaedd73c66cff57dc0e95610a9d5cb05a6f663942d64375d2b248c10997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 7176 bytes

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