Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabafdfd0fa768de…

MALICIOUS

PDF

41.9 KB Created: 2020-03-26 14:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0df6415b38e2d88e37822ae83d7be37c SHA-1: 4bf7426ebc4224a876fe14f4922d9292c8019ada SHA-256: eabafdfd0fa768de3965eecc63fd174ea56edfee22274ef286ad2aed7479e14a
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings.

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://shirleyflickinger.com/uploads/1/3/0/7/130739560/130739560.html#agatha+christie+the+abc+murders+xbox+one+review
    • http://autodiscover.ryandavidbirdlarson.com/uploads/1/3/1/0/131071175/d16e851a2c1.pdf
    • http://upstateunderdogrescue.com/uploads/1/3/0/2/130271158/kawiwu.pdf
    • http://www.visaliatowing.com/uploads/1/3/0/5/130590117/6220978.pdf
    • http://city2go.net/uploads/1/3/0/3/130313289/jimavodo.pdf
    • http://artvvork.com/uploads/1/3/0/5/130550970/7189522.pdf
    • http://www.endodonticassociatesbc.com/uploads/1/3/0/8/130874222/geremalozitig.pdf
    • http://realestate.vmaprofessionals.com/uploads/1/3/0/6/130640191/wagozutile-zitijezuwaruga-devasijafor.pdf
    • http://advbioco.com/uploads/1/3/0/4/130490181/siwuvasipaf.pdf
    • http://leadreads.com/uploads/1/3/0/7/130739776/1419882.pdf
    • http://thesoundmandxb.com/uploads/1/3/0/4/130476216/jodatafow.pdf
    • http://www.mumefarm.com/uploads/1/3/0/5/130543667/bcf8361.pdf
    • http://re-homes.org/uploads/1/3/0/6/130620859/cbadcd8829.pdf
    • http://rowdyroysrockets.com/uploads/1/3/0/4/130488299/7684264.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_off0000771c.bin
e7edc1601bdb1a4b43f60faad002351ab9fa3f6f6198134814a6c3713695d032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771C 8656 bytes

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