Malicious PDF — malware analysis report

Static analysis result for SHA-256 415df9265013e16e…

MALICIOUS

PDF

41.7 KB Created: 2020-03-29 13:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da08c5819c52492fc77f0393c036f88e SHA-1: 24b674cf9f2a3833aca641550b9692c5ff6716ba SHA-256: 415df9265013e16e554ec0c2ff41cb34db19b8bac544b026d678529b8833c7b5
94 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing a large number of external URLs pointing to other PDF files. The ML classifier strongly indicated maliciousness. The primary purpose appears to be directing users to a vast network of websites, likely for SEO manipulation or to host further malicious content. 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://michaelshusko.com/uploads/1/3/0/9/130969103/130969103.html#insinkerator+evolution+select+plus+lowes
    • http://gn4151.com/uploads/1/3/0/4/130476830/ziramixevevarar.pdf
    • http://www.whygallery.org.uk/uploads/1/3/0/7/130775558/9b1d4ea.pdf
    • http://loverawcoco.com/uploads/1/3/0/2/130272254/ramabil.pdf
    • http://kilosbayanihan.com/uploads/1/3/0/6/130604627/megiterorasen.pdf
    • http://ajmcyprus.com/uploads/1/3/0/5/130550781/87786d5.pdf
    • http://salesleadershipseries.com/uploads/1/3/0/5/130542866/9440197.pdf
    • http://sharonmgalup.com/uploads/1/3/0/3/130323908/8867173.pdf
    • http://kimslovablemutations.com/uploads/1/3/0/2/130287289/janerivanixut.pdf
    • http://3d-plasticsurgery.com/uploads/1/3/0/2/130288507/2603335.pdf
    • http://integra-is.com/uploads/1/3/0/7/130739006/8763313.pdf
    • http://sahfsebertahunterfoundation.net/uploads/1/3/1/3/131384403/16b7dfbee.pdf
    • http://rosshome.family/uploads/1/3/0/7/130776253/3171685.pdf
    • http://livingwordhouma.org/uploads/1/3/0/9/130969399/5415371.pdf
    • http://ohiovacationinformation.com/uploads/1/3/0/6/130639147/0e4fb88c8a8a.pdf
    • http://readytooclean.org/uploads/1/3/0/6/130621402/2879068.pdf
    • http://lucykatecrafts.com/uploads/1/3/1/1/131163777/jijasaladet.pdf
    • http://urgentcare4women.com/uploads/1/3/0/9/130969283/3488110.pdf
    • http://maximemetalcreations.com/uploads/1/3/0/3/130324203/55729bfa.pdf
    • http://manhattanmattress.com/uploads/1/3/0/4/130478819/tesaxatoginiwek.pdf
    • http://connorlumley.com/uploads/1/3/0/7/130775350/85600.pdf
    • http://jukesbar.net/uploads/1/3/0/8/130814966/3022e5399c35.pdf
    • http://catalystleaders.org/uploads/1/3/1/0/131071072/0b7c21.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006552.bin
67c60ec7a8dd9f47e80f3b988b2cf29d9cf25dd47703c314e9ee57e32714aaf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 7600 bytes
font_01_sfnt_off0000830a.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 16204 bytes

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