Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db6a7397f35d626…

MALICIOUS

PDF

29.1 KB Created: 2020-04-18 16:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e48a30ea8748df47763e4f32654a3536 SHA-1: 145c5e7f1074573eb15767c904e1e6638651204f SHA-256: 2db6a7397f35d6261e127e67b0cb5616cfb6df5310806705cbbe3f027430af4d
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains text related to background images and PDF generation tools, suggesting a lure to potentially malicious websites disguised as legitimate 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://cozyoasis.com/uploads/1/3/0/5/130545800/130545800.html#building+background+images+free
    • http://porcelaintilehouston.com/uploads/1/3/0/9/130969570/b2efb0f8b344.pdf
    • http://timemanagement.guru/uploads/1/3/1/4/131437246/lilin.pdf
    • http://shanesullivanministry.com/uploads/1/3/1/4/131437728/5333255.pdf
    • http://matt281820.org/uploads/1/3/1/0/131070843/3704470.pdf
    • http://bluedotcbd.net/uploads/1/3/0/5/130543569/kugifinusuxa_ponazopo_suwawigopipule.pdf
    • http://swpppit.net/uploads/1/3/1/4/131453329/sezolugugesumuvop.pdf
    • http://northernmetal.shop/uploads/1/3/0/7/130739430/zimafavib.pdf
    • http://robertgordonfogelson.com/uploads/1/3/0/4/130476830/589c4c25bebb.pdf
    • http://brightpixelsmedia.com/uploads/1/3/0/7/130776740/digezavap.pdf
    • http://mashallahllc.com/uploads/1/3/0/6/130639962/dde7d5.pdf
    • http://johnscreektowing.com/uploads/1/3/0/5/130588581/7045614.pdf
    • http://homefromhomebandbwinchester.com/uploads/1/3/1/1/131164455/vifetukuvis.pdf
    • http://uxwcdconference.com/uploads/1/3/0/6/130604181/wozopibilopomogo.pdf
    • http://doxcapital.com/uploads/1/3/0/5/130547999/fba9e.pdf
    • http://slabtownstudios.com/uploads/1/3/0/5/130590096/3736290.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_off00004ee9.bin
cd7483424203ed4bd82bf125957dda0220f9a41ed65674f28140cdc522ae47cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE9 5764 bytes

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