Malicious PDF — malware analysis report

Static analysis result for SHA-256 517776b13770c142…

MALICIOUS

PDF

61.9 KB Authoring application: Smallpdf Desktop First seen: 2020-09-24
MD5: c4b09df40506b97e5c3edd0c5423407c SHA-1: a09db095d0ff2bd876e2366964d8483a744ec371 SHA-256: 517776b13770c142048cf61874ea3b645601c4dc7ddfaf3394cbff80576de633
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as phishing and traffic redirection. The document body, though partially obfuscated, contains references to external URLs, reinforcing the link-farming attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://acreditleap.com/uploads/1/3/0/5/130539875/7c8f0be.pdf In PDF document text
    • http://thestorefrontgallery.com/uploads/1/3/0/4/130483577/48072331e9.pdfIn PDF document text
    • http://newholland4wdtractor.com/uploads/1/3/0/6/130621464/e27248.pdfIn PDF document text
    • http://mold-a-rama.net/uploads/1/3/0/5/130589244/f12a66fc18.pdfIn PDF document text
    • http://piqiplay.com/uploads/1/3/0/3/130379627/12b1adc5e92c9c1.pdfIn PDF document text
    • http://oliverapps.net/uploads/1/3/0/2/130272296/9f5bbac1d457.pdfIn PDF document text
    • http://tahoegoogletours.com/uploads/1/3/0/6/130605416/3339525.pdfIn PDF document text
    • http://pahasapagrotto.com/uploads/1/3/0/5/130589305/3579595.pdfIn PDF document text
    • http://bcrtech.org/uploads/1/3/0/4/130435774/80fc8b.pdfIn PDF document text
    • http://woodlandstuition.com/uploads/1/3/0/7/130775519/130775519.html#the+black+dagger+brotherhood+an+insider%27s+guide+vkIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: familiarizarse.info 11 samples

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_off00001317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317 10316 bytes
SHA-256: ebe07e787e554a70816fa0422a31c7fa57297d663871c4ae9b8859d2a71a81bc
font_01_sfnt_off00004a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3C 16368 bytes
SHA-256: 448c4d4550ed59c7e8e80b6d66b986666620351883d23913e38401b861762e5b

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