Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f24d1f22ebabe83…

MALICIOUS

PDF

36.6 KB Authoring application: LibreOffice
MD5: 041b9bfd09574994e9fadba1859e5f04 SHA-1: 3e2a6be8c336d6c50234d9a4d28c95ef47a1eed1 SHA-256: 0f24d1f22ebabe8356377c1535009ab028447a8ae7fcb45d3eedaa6285f25f2a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files, many of which are algorithmically generated, indicating a link farm or SEO abuse tactic. The embedded URLs are designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pom.mumi-dol.ru/uploads/2020/01/27/mitobovonegek-fenani.pdf
    • http://whenlovematters.com/uploads/1/3/0/2/130271139/040a693811.pdf
    • http://faberanot.skynetdonate.xyz/uploads/2020/01/28/7534019.pdf
    • https://bexedaxoxujo.weebly.com/uploads/1/3/0/2/130291592/juvojabizipawo.pdf
    • http://videoveb.info/uploads/2020/01/27/4b6bf53590.pdf
    • http://mindbodyconnectionmassagepilates.com/uploads/1/3/0/6/130621691/eba334375f.pdf
    • http://lisabholland.com/uploads/1/3/0/6/130621387/591416.pdf
    • https://xijobosaso.weebly.com/uploads/1/3/0/4/130489152/kitefuvofimarinuxi.pdf
    • http://notablecreationsco.com/uploads/1/3/0/2/130272511/c56262fbac6e7c.pdf
    • http://blscontractingllc.com/uploads/1/3/0/2/130289763/xegid.pdf
    • http://connorcopelandcreative.com/uploads/1/3/0/6/130639258/zakaxe.pdf
    • http://splitfingerstudio.com/uploads/1/3/0/6/130604129/wakegibezejaze-babogapu-wogirivawixi.pdf
    • https://lefijofe.weebly.com/uploads/1/3/0/2/130272275/mitixedigekaxomu.pdf
    • http://thelordswriter.com/uploads/1/3/0/2/130289448/44c8c708ac47.pdf
    • http://rbrvocal.weebly.com/uploads/1/3/0/4/130435960/duvuwatofaziba.pdf
    • http://approachableworld.com/uploads/1/3/0/4/130435622/b4a9266.pdf
    • http://zuk.antlermediagroup.com/uploads/2020/01/27/c0694.pdf
    • http://5pointauto.com/uploads/1/3/0/6/130620603/130620603.html#difference+between+plant+and+animal+cell+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014d5.bin
f5cc35608bf31f3b4d7fbbabb2f5025787e1b50cd701d53f3e18baa705125782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5 7760 bytes

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