Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fca6c6d0e7a759…

MALICIOUS

PDF

50.2 KB Authoring application: Smallpdf Desktop
MD5: cbf161854474cfcbd4bb89cea4380ed7 SHA-1: 0aacee19bc2834af2de63ab3e875f3590fd56008 SHA-256: 84fca6c6d0e7a7596a5e56f80aa6945f20d1239b302eada44885e59e1e2bf46d
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The critical PDF_SEO_LINK_FARM heuristic identified a large number of external links, suggesting a link farm designed to redirect users to malicious content. The embedded URLs are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://kinderdanceswfl.com/uploads/1/3/0/5/130588554/0c2b4732f2d.pdf
    • http://wafatelu.ekkohouse.ru/uploads/2020/01/29/bezezaxikugedisuw.pdf
    • http://whitcombhomeinspections.com/uploads/1/3/0/3/130323407/renikisidagenutagix.pdf
    • http://citizen-agency.com/uploads/1/3/0/4/130435757/fewivumedu.pdf
    • http://newlaneboutiquelc.store/uploads/1/3/0/6/130639936/jeloze-lozak-xoxepopama-zufuzuxaramuj.pdf
    • http://dry-2-go.com/uploads/1/3/0/5/130551639/delivobasefa-xulilinetejixez.pdf
    • http://wof.codecollector.org/uploads/2020/01/29/kijilaponixum.pdf
    • http://apologiesfrommen.com/uploads/1/3/0/6/130622120/fibowofe_runulugojadexit_fegagow.pdf
    • http://newresume2019.com/uploads/1/3/0/6/130621015/2036722.pdf
    • http://traderhsm.com/uploads/1/3/0/3/130312916/5785153.pdf
    • http://cleaningservicesresidentialcommercial.com/uploads/1/3/0/6/130639603/xepexikagis.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130603704/130603704.html#blindness+full+movie

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001324.bin
051446fe037c2c808efc985c25d93777e52be2bc46b17531269bd235e5497342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1324 8712 bytes
font_01_sfnt_off00007adb.bin
b1fcf9f8c3dc078ca107b5753a8b1be59452058b5907d385fb3693ccdb0897e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADB 16992 bytes

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