Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbd9e8a58ab93da…

MALICIOUS

PDF

38.1 KB Created: 2020-05-16 22:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 90c79a85c36ea5fa67ea9e84e731dd94 SHA-1: 3011e2fc8ac7c2a641f47b6e414e210730ede469 SHA-256: 7dbd9e8a58ab93da957c048c310c885c52c324751b160d14dafdce8a0ce621e4
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://onkoyoga.com/uploads/1/3/1/4/131407083/131407083.html#geode+crystal+identification+guide PDF link annotation
    • http://sejour-linguistique-australie.ch/uploads/1/3/0/5/130590678/9539896.pdfIn PDF document text
    • http://arquitetandoartes.com/uploads/1/3/0/6/130620843/mujasa.pdfIn PDF document text
    • http://mizzbombshell.com/uploads/1/3/0/2/130289541/nixabuj.pdfIn PDF document text
    • http://mysbeauty.com/uploads/1/3/0/4/130488169/3084007.pdfIn PDF document text
    • http://smcconsulting.fr/uploads/1/3/1/4/131409926/voxij-memoma.pdfIn PDF document text
    • http://tamiymhealthandfitness.com/uploads/1/3/1/8/131857144/2342533.pdfIn PDF document text
    • http://eurobonus.lt/uploads/1/3/0/5/130589124/kikejabe-vidivojefoji-bizis-gepoda.pdfIn PDF document text
    • http://piercelegislativeforum.com/uploads/1/3/0/5/130544072/2548089.pdfIn PDF document text
    • http://kimjarvis.net/uploads/1/3/0/6/130620555/31a9594.pdfIn PDF document text
    • http://eibbedpadilla.com/uploads/1/3/1/0/131070314/biwituguwuwebimes.pdfIn PDF document text
    • http://dironrutty.com/uploads/1/3/0/7/130739068/9e8f6.pdfIn PDF document text
    • http://portagejiu-jitsu.net/uploads/1/3/0/6/130640164/jenewabasusen.pdfIn PDF document text
    • http://gettingscripted.com/uploads/1/3/1/4/131406321/ganisuwaguxazubiba.pdfIn PDF document text
    • http://ma-logan.com/uploads/1/3/0/8/130873976/xaxonijuvaxinafiduxo.pdfIn PDF document text
    • http://schmaltzcreative.shop/uploads/1/3/0/6/130605490/6d702596.pdfIn PDF document text
    • http://addictivedecadantmusthaves.com/uploads/1/3/0/5/130588531/xikegoda_fudovesu_gobovux.pdfIn PDF document text
    • http://anthony-hart.com/uploads/1/3/0/7/130775822/jitupaxonedisim-taxinuxovus-pigirorusug-kerer.pdfIn PDF document text
    • http://julietew.com/uploads/1/3/0/8/130874289/4670114.pdfIn PDF document text
    • http://sandrahaus.com/uploads/1/3/0/7/130739629/7759067.pdfIn PDF document text
    • http://helse-velvare.no/uploads/1/3/0/5/130551090/4340962.pdfIn PDF document text
    • http://consecogroup.net/uploads/1/3/0/3/130323161/foverod.pdfIn PDF document text
    • http://9f60hmh100.com/uploads/1/3/0/7/130775259/venemozavok.pdfIn PDF document text
    • http://vaganture.com/uploads/1/3/0/7/130739452/mulokurupapiboku.pdfIn PDF document text
    • http://rosandcompany.com/uploads/1/3/1/3/131398358/fedul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 10276 bytes
SHA-256: 481131f69b75bf474d4a60348e2c48415c6dbacd35a6e24c4ad9e9211ad5a6b9

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