Malicious PDF — malware analysis report

Static analysis result for SHA-256 1227c9bc85a2f4de…

MALICIOUS

PDF

54.4 KB Authoring application: LibreOffice First seen: 2020-09-24
MD5: 616376e48c1875b2696c9498d3b6cef2 SHA-1: 49edb7fa0998d03b41226ae3c8ea17341b2667a5 SHA-256: 1227c9bc85a2f4de917d8c91a85595ce55491940c3ebb9646058a08739c3f13c
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, which is a common technique for distributing malicious content or leading users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the primary attack pattern involves redirecting users through numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://bemexobi.slepttava.xyz/uploads/2020/01/28/668b6fd.pdf In PDF document text
    • http://shopcenter17.fun/uploads/2020/01/29/86c4a7c.pdfIn PDF document text
    • http://xp-streich.com/uploads/1/3/0/5/130542953/dasadesekape-turadamo.pdfIn PDF document text
    • http://robynbredvick.weebly.com/uploads/1/3/0/2/130289201/2646491.pdfIn PDF document text
    • http://ymsdreamcatchers.weebly.com/uploads/1/3/0/3/130379216/2741196.pdfIn PDF document text
    • http://fexanaja.totachi-fs.com/uploads/2020/01/28/5300253.pdfIn PDF document text
    • http://msert.net/uploads/1/3/0/6/130620354/wubivaje.pdfIn PDF document text
    • http://playtherapyonlinetrainingacademy.com/uploads/1/3/0/4/130476974/xexafoxe.pdfIn PDF document text
    • http://agilemy.life/uploads/1/3/0/6/130639398/vifaxo.pdfIn PDF document text
    • http://wedopoge.btccn.pw/uploads/2020/01/29/puwidogekebobipa.pdfIn PDF document text
    • http://nicoleedwardslimited.org/uploads/1/3/0/5/130550873/0be204d993a1.pdfIn PDF document text
    • http://nuj.grushart.ru/uploads/2020/01/29/db8ccda1.pdfIn PDF document text
    • http://zemedimala.ibuyersclub.com/uploads/2020/01/29/2332818.pdfIn PDF document text
    • http://scoutx.us/uploads/1/3/0/4/130435726/38a8444714fc.pdfIn PDF document text
    • http://mgtowtv.com/uploads/1/3/0/6/130605519/dadimela.pdfIn PDF document text
    • http://misssoutheastpageantry.us/uploads/1/3/0/6/130639656/130639656.html#expenses+tracker+google+sheetsIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435 9116 bytes
SHA-256: 1b0750cecb3cf67ef35cb385d94b04c2381adda02b5f58c3db58f862fb001d0d
font_01_sfnt_off00008895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8895 5544 bytes
SHA-256: bdf78840ded9182e3b973e0079560a771e2d760334bb1b824e7cc23347121867
font_02_sfnt_off000099cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CC 2696 bytes
SHA-256: 2563807223d686b98c00555c583c39a0d8e0d5539b1537586a5d9d14e57bf7bf

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