Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f21362e32c2b0ce…

MALICIOUS

PDF

42.2 KB Created: 2020-03-12 02:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f4c395e57737f79d3c1ba417fbe7cb0b SHA-1: 963429138b7964cf46238ebb426dddac497eff6c SHA-256: 6f21362e32c2b0ced83afde5a4d33f7f11a9d5dccb3b1e02dce5bb0d526df0e2
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a page discussing 'consecuencias psicologicas del embarazo no deseado en la adolescencia', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The embedded links likely serve to distribute further malicious content or redirect users to phishing sites.

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://71-159-221-60.overtimefitness.com/uploads/1/3/0/3/130323355/130323355.html#consecuencias+psicologicas+del+embarazo+no+deseado+en+la+adolescencia
    • http://mccleansolutions.com/uploads/1/3/0/4/130436049/2376812b37e7d6.pdf
    • http://realhistory.org/uploads/1/3/1/1/131164236/vepumekawa.pdf
    • http://bradandrod.com/uploads/1/3/0/6/130603860/aa376c82.pdf
    • http://member.v-i.biz/uploads/1/3/0/4/130435732/101418.pdf
    • http://dragondrones.org/uploads/1/3/0/2/130288444/861064.pdf
    • http://www.pawsitiveresultsllc.com/uploads/1/3/0/4/130476417/bukafekalorijut_zagenudegizeku.pdf
    • http://viemedia.com/uploads/1/3/0/8/130873782/zewaxi.pdf
    • http://friendshiprule.com/uploads/1/3/0/3/130313173/jetikugib-kakadule.pdf
    • http://alwayswithlove.com/uploads/1/3/1/1/131163991/7212599.pdf
    • http://vancuber.com/uploads/1/3/0/2/130271076/ramikol.pdf
    • http://mail.cancer-ride-arctic-pacific-atlantic.kiwi.nz/uploads/1/3/0/2/130289573/dugix_pudofosu.pdf
    • http://havanadaysrestaurant.com/uploads/1/3/0/5/130588751/zonepotojolufuzarel.pdf
    • http://nevadalawguide.com/uploads/1/3/0/2/130274269/jamajude.pdf
    • http://nineviewer.com/uploads/1/3/0/5/130544063/5309897.pdf
    • http://www.paultomassoni.com/uploads/1/3/0/7/130775905/4581647.pdf
    • http://doneagainhomes.net/uploads/1/3/0/4/130483757/nipudexuv.pdf
    • http://snappees.com/uploads/1/3/0/6/130621903/wovivabe-bozujim-guzevoxilaji.pdf
    • http://marisabolson.com/uploads/1/3/0/4/130435654/6737517.pdf
    • http://skybluecounseling.com/uploads/1/3/0/7/130776485/nemiwot_vimiz_gejedanujirar_dudulojadodapod.pdf
    • http://superyachtpanel.com/uploads/1/3/0/7/130776319/2c9d3d908.pdf
    • http://troyyu.photography/uploads/1/3/0/7/130776351/6446239.pdf
    • http://madcarn.com/uploads/1/3/0/7/130738616/91a65af3b2.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_off00007955.bin
def928e999a4c0254caf516d26b6e65acd4b6e164e2bc874e1d524d2f7fda6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 8544 bytes

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