Malicious PDF — malware analysis report

Static analysis result for SHA-256 1472da0f3787d22b…

MALICIOUS

PDF

123.1 KB Created: 2020-03-23 04:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b36c80612cd9782581bf7eb138f7346b SHA-1: c715c202a150a833e61cc6ffdc874038e60f9077 SHA-256: 1472da0f3787d22b37dfd8e1887a14b18fee92f5ea01a3cdffe83d76a79f4c03
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 as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://a-team-training.de/uploads/1/3/0/9/130968995/130968995.html#development+milestones+for+10+month+old
    • http://miltiadesdevelopements.com/uploads/1/3/0/5/130543353/liwisaxuj-bajegenepejuwis.pdf
    • http://shopwhitesbakery.com/uploads/1/3/0/5/130540795/nubidugefo-gubawavi.pdf
    • http://megowerbung.com/uploads/1/3/0/2/130272420/5619403.pdf
    • http://sissyporn.com/uploads/1/3/0/6/130639526/cc517deab581574.pdf
    • http://sigel.solutions/uploads/1/3/0/5/130588987/favuramisufagagos.pdf
    • http://jlingnau.net/uploads/1/3/0/6/130639842/tekexosu.pdf
    • http://www.mooredems.com/uploads/1/3/0/2/130289521/ff95b90d2a0.pdf
    • http://vodajulijana.si/uploads/1/3/0/6/130620587/6031779.pdf
    • http://kjconsulting.solutions/uploads/1/3/0/4/130435888/ef94b52bc25.pdf
    • http://fairmontcabin.com/uploads/1/3/0/7/130740490/pozinoxi.pdf
    • http://majesticnursery.com/uploads/1/3/0/6/130620283/5663680.pdf
    • http://theresa-rose.com/uploads/1/3/0/2/130271240/filenajemojaxipon.pdf
    • http://huaerjieyulechengtouzhu.f18.ebkf.org/uploads/1/3/0/9/130969209/72721513cdc15f4.pdf
    • http://callananfitclub.com/uploads/1/3/0/2/130272275/0e15537f6.pdf
    • http://www.accountal.com.au/uploads/1/3/0/4/130477663/kurajoj_gomana_ritumuzuni.pdf
    • http://pattayapropertymanagement.com/uploads/1/3/0/5/130588333/a1f6c7.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_off0001bc71.bin
2c21420390a164fe958c68c7c26c83262e82561296c3484cde443a77e48c9069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC71 8380 bytes

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