Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a8eb8976be2a4e…

MALICIOUS

PDF

47.4 KB Created: 2020-03-21 02:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 36e3a211aee054e2729eebff299d8266 SHA-1: a493a846bce094ebd3452250934c97ec482c001e SHA-256: a8a8eb8976be2a4efc2ea54b836aed9355ab81cf06c21e52cb98fc2576350f5c
94 Risk Score

Malware Insights

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

The PDF document was identified as malicious by an ML classifier. It contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The embedded document body text, though partially corrupted, contains references to URLs that are also present in the list of extracted URLs, reinforcing the link farm nature of the document.

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://chichesterfootandankle.org/uploads/1/3/0/4/130476307/130476307.html#chicago+race+riot+1966
    • http://www.stefanostattoostudio.com/uploads/1/3/0/5/130539992/e485a.pdf
    • http://paulushookcafe.com/uploads/1/3/0/3/130323794/e9531cf4.pdf
    • http://backup.pinnacleven.com/uploads/1/3/0/3/130313404/bafutejomegef.pdf
    • http://dragonlandsfilm.org/uploads/1/3/0/7/130738506/bexavi-ridajobim-wokamafub.pdf
    • http://straightpipeexhaust.com/uploads/1/3/0/7/130739072/jiranibo.pdf
    • http://www.normworth1startist.com/uploads/1/3/0/5/130590111/kanidokoxoniduvamus.pdf
    • http://socorroopen.com/uploads/1/3/0/6/130639972/6546624.pdf
    • http://wangshangdoudizhuyingqiande.f18.ebkf.org/uploads/1/3/0/3/130323157/gasorositom_wadozekusezif.pdf
    • http://renoluxone.com/uploads/1/3/0/7/130775143/186c856bc2b175.pdf
    • http://synchronyleds.us/uploads/1/3/0/3/130323423/8867153d61.pdf
    • http://prestigepayeeservices.org/uploads/1/3/0/6/130621280/2936296.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_off00008e4f.bin
714af17d7603c96690f6dabcccd2eaf2607b92e85cab74e778abce80b1e7650b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4F 8560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.