Malicious PDF — malware analysis report

Static analysis result for SHA-256 47443d38df312860…

MALICIOUS

PDF

33.0 KB Authoring application: Serif PagePlus
MD5: 929c6e1020c3201f118ce6b4d146cd2d SHA-1: eb774beb239015644c321937ddf1b5848075e2b4 SHA-256: 47443d38df312860149f5244946cf54fd09ca65ef426b220947b10e38734b1bd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm used for SEO poisoning. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the embedded URLs strongly suggest a phishing or traffic redirection scheme. The document body, while containing text about 'Double negatives worksheet answer key', also embeds numerous URLs, indicating a lure to download further malicious content.

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 https://xujuzifuwifo.weebly.com/uploads/1/3/0/5/130590496/7578744.pdf
    • http://sevoxe.echoww2.com/uploads/2020/01/29/sazusubedife_wotazabupewas.pdf
    • http://dizuxamej.thisthoughts.com/uploads/2020/01/28/vakufupiner.pdf
    • http://efficientenergy.ru/uploads/2020/01/28/1442967.pdf
    • http://jemivam.guarchibao-fatcaps.info/uploads/2020/01/27/3c9a73.pdf
    • http://diggerdoos.com/uploads/1/3/0/4/130476083/xujabenika-miwizozuwupo-votolojilasa.pdf
    • http://littlehernaiz.com/uploads/1/3/0/5/130588983/satabiretomopaja.pdf
    • http://soxuminemo.copyright-1000321452.com/uploads/2020/01/28/a482f1f92522.pdf
    • http://slpwaboard.org/uploads/1/3/0/2/130271030/rumanumatuz.pdf
    • http://fotu.tastydowns.com/uploads/2020/01/27/3660895.pdf
    • http://preventyogainjury.com/uploads/1/3/0/3/130323271/130323271.html#double+negatives+worksheet+answer+key

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001289.bin
4c58513ee580eb90edb2e3c6e946e76acfc35b9a098c8be532d08e2a91a42994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1289 7788 bytes

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