Malicious PDF — malware analysis report

Static analysis result for SHA-256 877728c222208a0c…

MALICIOUS

PDF

44.0 KB Created: 2020-03-27 03:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 44bc54580e2ff5d475faa27f922b78d9 SHA-1: f1fda1126baa80ac0c94febd78bfc8ce29253182 SHA-256: 877728c222208a0c2c88d5b55cd28478e32ff7456ed59cd32253122ddd930bb7
96 Risk Score

Malware Insights

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

This PDF document is designed to function as a link farm, embedding numerous external URLs that point to other PDFs. The primary goal appears to be SEO manipulation or directing traffic to a network of unrelated sites, rather than delivering a direct payload. The ML classifier strongly indicated maliciousness, and the PDF structure with mass external links supports this assessment.

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://localcrimescenecleanup.info/uploads/1/3/0/5/130546593/130546593.html#perforated+appendicitis+nursing+care+plan PDF link annotation
    • http://www.panimals.com/uploads/1/3/0/5/130590548/pusixawawanajifu.pdfIn PDF document text
    • http://veladinatura.com/uploads/1/3/0/7/130739488/zixosodi.pdfIn PDF document text
    • http://tannerromleski.com/uploads/1/3/0/7/130776499/6667518.pdfIn PDF document text
    • http://untakenpath.com/uploads/1/3/0/2/130287283/4455345.pdfIn PDF document text
    • http://hopehousejourneyofhope.org/uploads/1/3/0/7/130776102/742674.pdfIn PDF document text
    • http://adamcirucci.com/uploads/1/3/0/3/130313213/xizalak.pdfIn PDF document text
    • http://mfest.com.au/uploads/1/3/0/7/130775982/8047697.pdfIn PDF document text
    • http://texascenterforregionalstudies.org/uploads/1/3/0/4/130488415/kudupu.pdfIn PDF document text
    • http://zumaliwoesurfboards.com/uploads/1/3/0/6/130620249/wexuzuxujegamubovik.pdfIn PDF document text
    • http://stmmlwr.org/uploads/1/3/0/5/130538875/binogifixizez.pdfIn PDF document text
    • http://kumc.dadgifts.us/uploads/1/3/0/6/130640163/3940190.pdfIn PDF document text
    • http://www.todorental-net.todorental.com/uploads/1/3/1/0/131070220/getuxoj.pdfIn PDF document text
    • http://slocampnpack.com/uploads/1/3/0/7/130739129/54b509c309ee.pdfIn PDF document text
    • http://thezedhotel.com/uploads/1/3/0/5/130545733/vuxetuzame.pdfIn PDF document text
    • http://usalottoking.com/uploads/1/3/0/3/130312929/ronafepabori.pdfIn PDF document text
    • http://4jvgp.bpmtc.com/uploads/1/3/0/2/130272333/849bdf65b0.pdfIn PDF document text
    • http://amgidaho.org/uploads/1/3/0/6/130639779/nazaneku.pdfIn PDF document text
    • http://sunriseblendroasters.net/uploads/1/3/0/6/130604993/7f1758a4b.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 1

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_off00008530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 7516 bytes
SHA-256: 3c50d28d7e727dec3bef91a82db72db273c27fbd2fd52ce7b1990a17fb9769b2

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