Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a712faaaddcbba4…

MALICIOUS

PDF

36.7 KB Authoring application: QPDF
MD5: 99015b95710e33798ef8008c9eac07eb SHA-1: 6ed95f9810e9cc3545d34e65302f6985b78e89f8 SHA-256: 2a712faaaddcbba41ee70170ca80657742786dee55609153aa9e2df39aee68c5
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on suspicious domains, indicative of a link farm for phishing or malware distribution. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body text, though heavily corrupted, contains references to 'Qukil antivirus free 2019' and URLs that appear to be part of a lure to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fos.artmexicano.online/uploads/2020/01/29/jilowomewezese.pdf
    • https://fimezekawoviduz.weebly.com/uploads/1/3/0/2/130289340/633356580.pdf
    • http://balokipe.aa46aa.top/uploads/2020/01/29/tadafekigawawid_zobube_lujajoremo_mezevagi.pdf
    • https://fomotukigem.weebly.com/uploads/1/3/0/5/130551567/vazurufomi.pdf
    • http://eloyjrojas.com/uploads/1/3/0/2/130270792/vagiluxejel_zaruzuzugi.pdf
    • http://mopola.com/uploads/1/3/0/5/130551019/012fef.pdf
    • http://pl3photosnouveauregard.ca/uploads/1/3/0/5/130543813/wagegokegoluge.pdf
    • http://squaretaper.info/uploads/1/3/0/5/130550880/nasozirenedilug-tapozu.pdf
    • http://miissb.com/uploads/1/3/0/5/130539494/130539494.html#qukil+antivirus+free++2019

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001201.bin
0b57a003391a3ab0f8d69205502540c69e754b81a8ed646b8259c047f7958286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201 8764 bytes

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