Malicious PDF — malware analysis report

Static analysis result for SHA-256 1864edb79fdbe4b0…

MALICIOUS

PDF

35.5 KB Authoring application: LibreOffice Draw
MD5: c3f364a9862f50c8df5545412934b808 SHA-1: 09fe7e03ad4f4f3cc0605a2e197667ab22a5ed15 SHA-256: 1864edb79fdbe4b0e37e1afc1bde03715dc3ef4c1762da02fbf6e085d3435c39
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic or distribute malicious content. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bobgruber.com/uploads/1/3/0/7/130776648/52a3780bcb.pdf
    • http://obieementor.com/uploads/1/3/0/3/130323298/susizak-mosewizem-kajari.pdf
    • http://titoki.agency/uploads/1/3/0/2/130289340/numafajopun.pdf
    • http://mmarieboutique.com/uploads/1/3/0/4/130488696/tatutib-biviju-dapoles-lideviwupeli.pdf
    • http://www.theatmpro.com/uploads/1/3/0/7/130775610/04d244c469a8d.pdf
    • http://tosta-muzic-production.net/uploads/1/3/0/6/130604855/pumubebiko.pdf
    • http://nexts-lab.com/uploads/1/3/0/6/130621022/mepoxelokipiwol.pdf
    • http://www.beckyhendrickartlife.net/uploads/1/3/0/8/130814078/5486420.pdf
    • http://protechion.us/uploads/1/3/0/8/130814254/medudomoxijusi.pdf
    • http://befirelight.co/uploads/1/3/0/4/130435978/73ab29f4e1b16b.pdf
    • http://stat360design.com/uploads/1/3/0/7/130739772/4622705b7.pdf
    • http://lovelifeagain-lifecoachingmore.com/uploads/1/3/0/5/130540214/79f5d6fbaeff18.pdf
    • http://ns1.our-lady.org/uploads/1/3/0/7/130775456/galuxorabawago-nolutufomu.pdf
    • http://9itgw.bpmtc.com/uploads/1/3/0/4/130477085/130477085.html#suffixes+and+prefixes+list+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e2.bin
02a3d86985a500cad9a60cf5784da99ffd19b820c050a0d82a91b6075d2e45bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31E2 7976 bytes

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