Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4561e14ff96e682…

MALICIOUS

PDF

30.4 KB Authoring application: Scribus
MD5: 85bd99e2367c20c104795b0ca0fd297d SHA-1: e98a51175fcfcd0e8b861d30a51f6ca570a4acd8 SHA-256: a4561e14ff96e6822a9bf56a0c145485a20567c5398bff8c0bc158b3e6268b44
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection further confirms its malicious nature. No scripts were extracted from this sample, and the document body contained mostly garbled text.

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://plastic-surgeryhouston.com/uploads/1/3/0/6/130604179/31f58d76e26e45e.pdf
    • http://www.gentlemensphoto.com/uploads/1/3/0/8/130874674/muguxagomalus.pdf
    • http://coachingunited.de/uploads/1/3/0/2/130289801/neduvot_tabunijisiz_denokomonugoxa_fisese.pdf
    • http://www.onewelfare.net/uploads/1/3/0/6/130621915/700e4566.pdf
    • http://cresslandbythesplash.com/uploads/1/3/0/4/130489001/aa8de0b5be.pdf
    • http://neotribes.com/uploads/1/3/0/7/130739107/zorilapixobusag_savizerumarag_munanetajuze.pdf
    • http://localator.net/uploads/1/3/0/7/130740427/fokinat.pdf
    • http://plumasrentals.com/uploads/1/3/0/6/130639032/db1486d49b9cd.pdf
    • http://creativetrekkie.com/uploads/1/3/0/3/130313340/dumakev-wewifar.pdf
    • http://amariahegypt.com/uploads/1/3/0/2/130272976/796fe96b7f.pdf
    • http://nkaskephotography.com/uploads/1/3/0/7/130740262/gajabomut.pdf
    • http://officer.mediutopia.com/uploads/1/3/0/2/130287839/130287839.html#dfs+graph+adjacency+matrix

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001ed0.bin
5cd79456eebdbc6ed66f4762f6d2bb061e722435095882d4a9c7651719def901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED0 8052 bytes

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