Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcb6fdf53cbf94d…

MALICIOUS

PDF

40.2 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 3787dd86c739b89b6af88136f1bff921 SHA-1: 6e22a044babb142426a8a8da070c960a9f77d253 SHA-256: 7bcb6fdf53cbf94dbf2de7517f25953a290a420ddbab384dd0afcb45563729d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ML classification, indicating malicious intent. The document body, though heavily obfuscated, contains numerous embedded URLs pointing to external PDF files. These URLs are likely used to distribute further malicious content or for SEO spamming, aligning with the PDF_SEO_LINK_FARM finding. No scripts were extracted, but the sheer volume of linked PDFs suggests a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://schoolchoicevermont.com/uploads/1/3/0/3/130379174/nutenoxitot.pdf In PDF document text
    • http://krissyoneill.com/uploads/1/3/0/2/130289793/dazujexaro.pdfIn PDF document text
    • http://vamekerbanks.com/uploads/1/3/0/2/130287872/10b10725f.pdfIn PDF document text
    • http://alexbchin.com/uploads/1/3/0/6/130621412/9986215.pdfIn PDF document text
    • http://applyfordisabilitynow.us/uploads/1/3/0/3/130313504/520718.pdfIn PDF document text
    • http://murrietasalvationarmy.org/uploads/1/3/0/2/130287221/5a763d258e7768.pdfIn PDF document text
    • http://nuobeijinghotel-chinese.devsite-1.com/uploads/1/3/0/2/130289763/xapifiwosalegabot.pdfIn PDF document text
    • http://paulaweeksinternational.com/uploads/1/3/0/5/130588307/sagenetabipafot.pdfIn PDF document text
    • http://taxperks.net/uploads/1/3/0/4/130476795/fffe212.pdfIn PDF document text
    • http://mypartypro.net/uploads/1/3/0/4/130476068/waboladeloru.pdfIn PDF document text
    • http://shrinedads.com/uploads/1/3/0/5/130588239/wenodib.pdfIn PDF document text
    • http://stuccovenetiano.com/uploads/1/3/0/6/130604492/gomadojil.pdfIn PDF document text
    • http://anthonybeastmode.com/uploads/1/3/0/4/130477661/fibinazevozejes.pdfIn PDF document text
    • http://hochu-apple.com/uploads/2020/01/28/b44d8b41fa9c5f4.pdfIn PDF document text
    • http://cjconcep.art/uploads/1/3/0/4/130488861/119d76bc090bbe.pdfIn PDF document text
    • http://gife.shopdochoi.tech/uploads/2020/01/27/pawabebak.pdfIn PDF document text
    • http://ncsdactivities.com/uploads/1/3/0/5/130589444/revuz_rusubaze_sorunaluzume.pdfIn PDF document text
    • http://shardexplorers.com/uploads/1/3/0/6/130639729/130639729.html#cara+buat+cold+brew+manualIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1490 7520 bytes
SHA-256: f6086faeda802c0c94c382032661a6dd5970dd670eb0447cb6d28d61a3729c85
font_01_sfnt_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086

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