Malicious PDF — malware analysis report

Static analysis result for SHA-256 0640a9209dab6bad…

MALICIOUS

PDF

54.4 KB Created: 2020-04-01 20:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: abffc79f4a8210dcaed689a73c849344 SHA-1: 172e52b4b94e7ddbb7357df7e9e4c9853f20dc51 SHA-256: 0640a9209dab6bad5afc4b795dcaf22631a5d207176154e0bb2e004117201895
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though garbled, contains a URL that mirrors the structure of these other links. This suggests a coordinated effort to create a link farm, potentially for SEO manipulation or to distribute malicious payloads via the linked PDFs. No scripts were extracted from this sample.

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://bbarconst.com/uploads/1/3/1/4/131437275/131437275.html#baby+led+weaning+6+months+first+food
    • http://ancienthand.net/uploads/1/3/0/2/130289767/5221841.pdf
    • http://ashleylovettliu.com/uploads/1/3/0/5/130590126/3406180.pdf
    • http://kytsfixes.com/uploads/1/3/0/5/130539093/deripuliforeduronomi.pdf
    • http://actionanimals.tv/uploads/1/3/1/4/131452904/82df33d1.pdf
    • http://ankhor.shop/uploads/1/3/0/5/130590363/5d1ae86558c.pdf
    • http://holisticglowskincare.com/uploads/1/3/0/7/130740143/wijisoraxoparu.pdf
    • http://futurefootballstars.org/uploads/1/3/0/4/130488812/769f7e174040.pdf
    • http://kollablogistics.com/uploads/1/3/1/0/131070498/37a050f6a227.pdf
    • http://notarypublicincalifornia.com/uploads/1/3/1/4/131453201/9a7245e95c7.pdf
    • http://doorwayclothing.com/uploads/1/3/0/5/130589317/nebunotovagareriju.pdf
    • http://4givenministries.com/uploads/1/3/0/5/130550679/9508b432837c234.pdf
    • http://princegreenhouses.com/uploads/1/3/0/2/130270955/fobedom-xerujafaxebeza-rabilakafefev-muxiw.pdf
    • http://virtualcollaborationcenter.com/uploads/1/3/0/2/130272478/tanivavazomulodogoj.pdf
    • http://bentv.co/uploads/1/3/0/5/130588296/3379184.pdf
    • http://whitesidesconsulting.com/uploads/1/3/1/0/131070158/4309444.pdf
    • http://odrtraining.net/uploads/1/3/0/6/130605072/039f6a9f52d.pdf
    • http://alliwantdesigns.com/uploads/1/3/1/4/131437308/8e8274437feb8.pdf
    • http://firezoneschaumburg.com/uploads/1/3/0/6/130604687/87367ea9ba4dfb.pdf
    • http://solutionsfunding.net/uploads/1/3/0/6/130639327/4487131.pdf
    • http://housechecked.net/uploads/1/3/0/3/130313346/ef3c3a5261.pdf
    • http://cmbtp.org/uploads/1/3/1/3/131398135/muxelowizowo.pdf
    • http://isabelladavidvintage.com/uploads/1/3/0/5/130546354/zupoxibatije-zojepumodetivi.pdf
    • http://beaded-gold.com/uploads/1/3/0/7/130738806/8233283.pdf
    • http://mikebilsky.com/uploads/1/3/0/5/130590158/resuron_zelitudigolup_mixewiv_wivupufine.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_off0000ac05.bin
c50c6b726771eb0124e9c935bdc1ae5fadccf4def4db1a98e213abe6b6753f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC05 8180 bytes

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