Malicious PDF — malware analysis report

Static analysis result for SHA-256 402524e7343c60c1…

MALICIOUS

PDF

37.0 KB Authoring application: Smallpdf Desktop
MD5: 5fedd5b05f721e82e86679a125d0faf4 SHA-1: 57a355e48f7a03baf10a9f413368ed3acc4b723f SHA-256: 402524e7343c60c1e9db71337d98e4f4909ec0b9544b18ff3c39a7904ae8311e
128 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with multiple URLs pointing to seemingly unrelated PDF files. The document body text, while garbled, mentions "Smallpdf Desktop Conversion pdf a excel online gratis" and "Click here to download", suggesting a lure to trick users into clicking these links. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious download intent.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://redskinscheerleaderalumni.com/uploads/1/3/0/3/130323774/1762987.pdf
    • http://crownemarketgroup.com/uploads/1/3/0/4/130483341/segodixofaviwatinuk.pdf
    • http://rpluscreativesmy.com/uploads/1/3/0/6/130639304/selisaliwasinomutubo.pdf
    • http://beckett.photos/uploads/1/3/0/6/130604525/78a1b81523c.pdf
    • http://benibiz.com/uploads/1/3/0/4/130483479/tanivanitifizopexafe.pdf
    • http://fonuporu.jetscan.tech/uploads/2020/01/29/jajedimenasel.pdf
    • http://mmeconnect.com/uploads/1/3/0/6/130621775/130621775.html#conversion+pdf+a+excel+online+gratis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001132.bin
066198c913966a0ece07ce3bdc296fbbe11cfa816f39fbf437d445643e1087b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1132 8132 bytes

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