Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f9bd0b4c6b4116…

MALICIOUS

PDF

40.3 KB Created: 2020-03-15 06:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b3122671ce9d2f9c747a5e57fd073242 SHA-1: 4eec65080836946197a2479eeead7ba2828fe51a SHA-256: a5f9bd0b4c6b4116ed29288ac280a873ff7591ef7db643749d023062ef227b3b
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, characteristic of a link farm. This technique is often used to manipulate search engine rankings or to distribute malicious payloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment.

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://carmelbayplaceholder.devsite-1.com/uploads/1/3/0/5/130588430/130588430.html#simple+past+form
    • http://camillecullen.com/uploads/1/3/0/4/130483983/1378729.pdf
    • http://thecountrycitygirl.com/uploads/1/3/0/2/130291539/zenozisebolesebifile.pdf
    • http://www.pitchervillesoap.com/uploads/1/3/0/9/130969434/mezuvidejepu_navev.pdf
    • http://rlhoutdoors.com/uploads/1/3/0/8/130873922/novub.pdf
    • http://magentabackpack.net/uploads/1/3/0/6/130604902/mavowamiregusorile.pdf
    • http://webmail.aidsdurham.com/uploads/1/3/0/4/130483558/1693096.pdf
    • http://www.heckofatool.com/uploads/1/3/0/5/130551967/xajawawasofiped.pdf
    • http://www.tcquality.org/uploads/1/3/0/6/130639038/laguxiwebonixo.pdf
    • http://frankpunt.com/uploads/1/3/0/6/130604582/282d764.pdf
    • http://sayulitadj.com/uploads/1/3/0/2/130288419/5af53f12b4150.pdf
    • http://jerrysautokeys.com/uploads/1/3/0/6/130605065/d54974.pdf
    • http://www.weddingdressesnewhampshire.com/uploads/1/3/0/5/130551635/b5be83d002.pdf
    • http://www.fischertaketwo.com/uploads/1/3/0/7/130739475/jezevuzukusimalew.pdf
    • http://www.wdaoklahoma.com/uploads/1/3/0/3/130323126/dasux_gugurusifimudes_tinepoluwipi_zanexed.pdf
    • http://www.treshijos.com/uploads/1/3/0/7/130776253/keginupijobobulu.pdf
    • http://rebeccacranstonforcolorado.com/uploads/1/3/0/4/130483656/1153575.pdf
    • http://www.kelownamicroacupuncture.com/uploads/1/3/0/7/130775321/1fffa0a08d8.pdf
    • http://hostmaster.kateloganbeauty.com/uploads/1/3/0/2/130291539/nuzafolepasesibilamo.pdf
    • http://bobslocker.com/uploads/1/3/0/6/130605509/futoxujedeledanuvoku.pdf
    • http://nongress.org/uploads/1/3/0/8/130814644/9653837.pdf
    • http://nancymackellar.com/uploads/1/3/0/2/130287873/bc6bd44dabce.pdf
    • http://mollyvstreiff.com/uploads/1/3/0/5/130588964/rowitun.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ba.bin
c22d3ffab19bc63d7c575a46582d36901a38cdebf8c94755448cad623756d42e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BA 8240 bytes

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