Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b5075ad576e3c6…

MALICIOUS

PDF

44.8 KB Created: 2020-03-31 01:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02d3b2a791d2fc1ab483acbc0eb0e8ed SHA-1: 884bf60ebea362c3a0083afcd0d5298d3bb24b4e SHA-256: 38b5075ad576e3c6070b1a17fe3bf7aa975b96488e68844aa63725270d382f00
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of specific behaviors.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://goodboysonlyclub.com/uploads/1/3/0/5/130588210/130588210.html#libros+de+matematicas+1+bachillerato+pdf
    • http://harrisonlakehousevacationhome.com/uploads/1/3/0/7/130776734/jilowurir_liragufap.pdf
    • http://yourbeautifulbrain.org/uploads/1/3/0/7/130776272/d1223baa.pdf
    • http://sorayaattia.com/uploads/1/3/1/4/131437376/899919.pdf
    • http://darrensiriani.com/uploads/1/3/0/8/130873820/zezowek-womonuralisejud-nudufupej.pdf
    • http://buydirectgaragedoor.com/uploads/1/3/1/1/131164312/nefoxil.pdf
    • http://troop555.org/uploads/1/3/0/6/130605335/kokoxofisite.pdf
    • http://stankarwoski.com/uploads/1/3/0/4/130489417/vevubela.pdf
    • http://thestepfords.com/uploads/1/3/1/1/131163514/cf6726fa.pdf
    • http://dancingforjoybook.com/uploads/1/3/0/5/130543106/jekapusaguwevi-mubisu-reviborimofalog-kotebiki.pdf
    • http://awhistleawaypetcare.com/uploads/1/3/0/6/130639259/a4b290355571df9.pdf
    • http://reikirevolution.org/uploads/1/3/0/6/130620431/fevepapivunakosexu.pdf
    • http://vanessalara19.com/uploads/1/3/0/6/130621483/zexivufonexuna-mekibuwajavewo-xelube.pdf
    • http://hannahfidler.com/uploads/1/3/1/0/131070497/paxiginez.pdf
    • http://fitactivebodies.com/uploads/1/3/0/2/130270762/6600818.pdf
    • http://thiscaregiverlife.com/uploads/1/3/0/5/130546497/vatelasop.pdf
    • http://permidri.com/uploads/1/3/0/4/130435819/2565467.pdf
    • http://jhdesignltd.com/uploads/1/3/0/4/130488580/wadusifeke.pdf
    • http://appbolo.com/uploads/1/3/1/4/131406732/pobimokewuvi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e41.bin
8f153fb4c821f9c407c240814089bc710eb7e222a337cabe2cdca79db268d536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 8660 bytes
font_01_sfnt_off00008dfd.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 16204 bytes

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