Malicious PDF — malware analysis report

Static analysis result for SHA-256 102a197a5cb35f8f…

MALICIOUS

PDF

52.4 KB Created: 2020-03-07 13:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31f9ce9192acaa66e5edc196b302ad17 SHA-1: 77d7a4c82265fc24ce5ff5005a604a9790f6c4a4 SHA-256: 102a197a5cb35f8fbcc00b59bb67a73df0ee5f55fb3f2f236ad2c9065c6eb201
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm, which is a common technique for distributing malware or directing users to phishing sites. The document body, though partially corrupted, contains a URL that mirrors the structure of many other extracted URLs, suggesting a coordinated effort to host malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment that this PDF is designed to lead users to harmful external resources.

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://p8w9b6.salon225.com/uploads/1/3/0/7/130775905/130775905.html#a+main+difference+between+capitalism+and+communism
    • http://mountaincreeklodging.com/uploads/1/3/0/7/130776027/ee5d76.pdf
    • http://www.alllivesmatterhotline.com/uploads/1/3/0/6/130603747/xolatulazoz_seropuzo_vejejipe.pdf
    • http://www.mrulmersmathunit.com/uploads/1/3/0/8/130814349/ridilowozujebati.pdf
    • http://portrisetrade.com/uploads/1/3/0/9/130969499/7983606.pdf
    • http://webmail.ckmcduffyconstruction.com/uploads/1/3/0/3/130323957/zeterovoxa.pdf
    • http://www.chicagokilnrepair.com/uploads/1/3/0/6/130604844/ginepiladoxasi.pdf
    • http://safedreams.org/uploads/1/3/0/7/130775031/mepumiwagize.pdf
    • http://fynsskiltedesign.dk/uploads/1/3/0/5/130540789/roxasejol.pdf
    • http://mail.graceandhopeconsulting.com/uploads/1/3/0/4/130436188/vixagad_taxisivak_gaxudevewijawe.pdf
    • http://openpeer.foundation/uploads/1/3/0/6/130639980/4107427.pdf
    • http://www.hatchwaygallery.com/uploads/1/3/0/7/130738693/0f2361d5f36476a.pdf
    • http://viktorsgang.com/uploads/1/3/0/5/130540799/79e12a.pdf
    • http://etuicollection.com/uploads/1/3/0/4/130476738/xogolefirebenaziput.pdf
    • http://ac-collaborative.com/uploads/1/3/0/6/130621569/mobobulile-misazuk-wafazivoter.pdf
    • http://www.hotelnovomundo.com.br/uploads/1/3/0/3/130323180/fivukugobe-fidagetupazazej.pdf
    • http://noisomheden.com/uploads/1/3/0/8/130874108/1719cdbf44d.pdf
    • http://reo.chambernation.com/uploads/1/3/0/9/130969222/voledokokidipiw-debapiko-poduvet-wojizapuk.pdf
    • http://www.kupponen.com/uploads/1/3/0/2/130288854/sojabepimerag.pdf
    • http://chillaxclub.com/uploads/1/3/0/5/130589078/pibozurujut.pdf
    • http://sabterra.org/uploads/1/3/0/8/130873914/sumukivuku.pdf
    • http://222-big-bon.site/uploads/1/3/0/6/130639123/3446499.pdf
    • http://www.crgardens.com/uploads/1/3/0/9/130969953/2ce41f32.pdf
    • http://easyphpwebsites.com/uploads/1/3/0/6/130639110/7649429.pdf
    • http://andrewspickert.com/uploads/1/3/0/6/130604529/lapimibuxiw.pdf
    • http://www.openlotusayurveda.com/uploads/1/3/0/6/130639746/latawuru.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ff2.bin
9f0377b34bea04d427a44d1719ec59d3d67db24fa0ce8d2ded986601316b2829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF2 7716 bytes
font_01_sfnt_off0000ae2b.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2B 16036 bytes

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