Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b73ae36309fdb91…

MALICIOUS

PDF

41.6 KB Created: 2020-03-24 08:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 26baf7e115a24c5b9b2b534ce0d93b40 SHA-1: c1f7064f40bc237039a72739f0f1169130b2f840 SHA-256: 9b73ae36309fdb91e034c0bd49ea4629aeddf6201c2997700b38097f3d6022db
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO abuse. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of potentially malicious or deceptive content through these embedded links.

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://aligned.shop/uploads/1/3/0/7/130740292/130740292.html#comando+centos+7+para+ver+ip PDF link annotation
    • http://widespectrum.net/uploads/1/3/1/0/131071072/ruwetesifumir.pdfIn PDF document text
    • http://corbelnw.net/uploads/1/3/0/5/130588508/ce513f053cbfb.pdfIn PDF document text
    • http://chamberswriting.com/uploads/1/3/0/4/130476320/4501017.pdfIn PDF document text
    • http://shanelissriordan.com/uploads/1/3/0/6/130621814/relogifusip.pdfIn PDF document text
    • http://kx3financial.com/uploads/1/3/0/2/130287875/wotixopexoje.pdfIn PDF document text
    • http://tabernacleumc.church/uploads/1/3/0/5/130550930/nesixaxawedipoki.pdfIn PDF document text
    • http://janekirby.info/uploads/1/3/0/9/130969089/1b1b25812.pdfIn PDF document text
    • http://goodboyfloat.com/uploads/1/3/0/5/130542717/minujagumunog-relixumagakuko-zulupuxemi.pdfIn PDF document text
    • http://tillerinternationalcapital.com/uploads/1/3/0/8/130814716/5369912.pdfIn PDF document text
    • http://ayla-illustration.net/uploads/1/3/0/5/130590123/c0b2cc8d5daa9.pdfIn PDF document text
    • http://bamaagents.com/uploads/1/3/0/6/130620393/girelumivuseg.pdfIn PDF document text
    • http://teaklogistics.com/uploads/1/3/0/4/130435960/1907937.pdfIn PDF document text
    • http://werkmandental.com/uploads/1/3/0/6/130621094/8550acbb4d5c.pdfIn PDF document text
    • http://www.dallasmendingminds.com/uploads/1/3/0/5/130588618/vupok.pdfIn PDF document text
    • http://irenkebstudio.com/uploads/1/3/0/5/130545537/9579376.pdfIn PDF document text
    • http://graysystemsinc.com/uploads/1/3/0/7/130738836/xifekibananun.pdfIn PDF document text
    • http://mail.cfameyes.com/uploads/1/3/0/6/130621299/f692f4c.pdfIn PDF document text
    • http://www.littlephotographycompany.co.uk/uploads/1/3/0/3/130379357/supeperikagujef.pdfIn PDF document text
    • http://a1545636xstreamtravel.xsideas.com/uploads/1/3/0/9/130968921/tivomuto.pdfIn PDF document text
    • http://www.manila-apartements.com/uploads/1/3/0/2/130291623/difujinigejese.pdfIn 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

Related samples 3

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_off000072ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 10128 bytes
SHA-256: 9dde4317ecab40136fb88a398b295dc436d87b2e8c3bf70fdfbe872b79fe1b2b

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