Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e862ddc8401bdc…

MALICIOUS

PDF

95.1 KB Created: 2020-04-11 06:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 294233e2b4b91a0645e664f966d22ee9 SHA-1: 7c7a282dabd55b3d840aa2d0e6dcfbc441bbbf6e SHA-256: 63e862ddc8401bdcc8bf5a6b7d25f7927f2238fbf0f7bec007af1e1f67003a20
104 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-like links suggests a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://74-123-72-13.mgwnet.com/uploads/1/3/1/4/131437341/131437341.html#printable+dm+screen
    • http://missionstreetcoffeeco.shop/uploads/1/3/0/7/130776423/jolawomaj_wopumen_buxise.pdf
    • http://acsphillycloud.com/uploads/1/3/0/2/130289354/d803559377ed2b.pdf
    • http://cadillacautorepair.com/uploads/1/3/0/5/130550888/bufapawugul_mujedamodaka.pdf
    • http://mosquee-alforqane-lille.com/uploads/1/3/0/8/130814716/8185919.pdf
    • http://jhquilts.com/uploads/1/3/1/1/131163857/342890c50a93.pdf
    • http://cmthain.com/uploads/1/3/0/6/130620667/lunowuxobegaruwawum.pdf
    • http://euro-tres.com/uploads/1/3/0/8/130814673/5f2b39.pdf
    • http://localspotshop.com/uploads/1/3/0/7/130740508/8879425.pdf
    • http://handymancandons.ca/uploads/1/3/0/5/130590374/pesojimetebavusela.pdf
    • http://jandalex.com/uploads/1/3/0/7/130738507/8964889.pdf
    • http://ugottohaveum.com/uploads/1/3/0/6/130604523/83a9115.pdf
    • http://apolloniacampaign.info/uploads/1/3/0/7/130776823/1244934.pdf
    • http://mail.jrba-ro.org/uploads/1/3/0/6/130620172/5585423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001423a.bin
15fa24e1092353b069f5f72dd008e6a525c9d21863e7c30f6662d91db9449dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1423A 9788 bytes
font_01_sfnt_off00016623.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16623 2616 bytes

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