Malicious PDF — malware analysis report

Static analysis result for SHA-256 870cb3ce32d83cbe…

MALICIOUS

PDF

34.7 KB Authoring application: Karbon First seen: 2020-09-07
MD5: 344b48ba34fb56f7e59aa242ecccba3f SHA-1: aaada47ab3203372768824332e522de5288715d2 SHA-256: 870cb3ce32d83cbe1ef52ef60d49659807a9c273ebbec087bdc2f979668a70b1
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of links to external PDF documents, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content, possibly as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://comprehensivefinancialplanningservices.com/uploads/1/3/0/7/130775619/juxefepizuduzap.pdf In PDF document text
    • http://conquerfirstaid.co.uk/uploads/1/3/0/7/130740033/9cfea6bf05ae910.pdfIn PDF document text
    • http://tools.blueknightsmcpgh9.com/uploads/1/3/0/9/130969950/vipamajabesofutajasu.pdfIn PDF document text
    • http://recipetango.com/uploads/1/3/0/9/130969430/pisavewo.pdfIn PDF document text
    • http://www.membershipcompass.com/uploads/1/3/0/3/130379060/najofe.pdfIn PDF document text
    • http://connectivityusa.net/uploads/1/3/0/5/130551986/6592841.pdfIn PDF document text
    • http://mattwolbertphotography.com/uploads/1/3/0/7/130739371/c15cae.pdfIn PDF document text
    • http://thewildflowerfarminn.com/uploads/1/3/0/6/130620778/0c8d5864a8.pdfIn PDF document text
    • http://www.lamethodewinningpitch.com/uploads/1/3/0/7/130775284/bepidanod-konik-kelojegetip.pdfIn PDF document text
    • http://bucklinbuilders.net/uploads/1/3/0/5/130590215/917840.pdfIn PDF document text
    • http://www.spankingmoviereview.com/uploads/1/3/0/7/130740533/nusosofeva.pdfIn PDF document text
    • http://arteagadentistry.com/uploads/1/3/0/2/130289431/tozelidinote.pdfIn PDF document text
    • http://1upinstruments.com/uploads/1/3/0/5/130551124/vupugakes.pdfIn PDF document text
    • http://www.introactivism.com/uploads/1/3/0/7/130739274/kegizigivasuk_zuvemedutok.pdfIn PDF document text
    • http://autodiscover.amateurhourfilm.com/uploads/1/3/0/2/130273573/8569e4a.pdfIn PDF document text
    • http://yonatan91.octarinesec.com/uploads/1/3/0/3/130313588/3748407.pdfIn PDF document text
    • http://terapiaregresiva.org/uploads/1/3/0/7/130739573/9d52eafa62c9b3f.pdfIn PDF document text
    • http://healthessentials.shop/uploads/1/3/0/7/130775328/56863f5b8d3.pdfIn PDF document text
    • http://alyssaperryinteriors.com/uploads/1/3/0/3/130323705/6265417.pdfIn PDF document text
    • http://www.betterartthanin.com/uploads/1/3/0/7/130776715/kidagemajivagab.pdfIn PDF document text
    • http://rejuvenationhealthcenter.net/uploads/1/3/0/6/130639703/925f43a7.pdfIn PDF document text
    • http://baronyofthelonelytower.org/uploads/1/3/0/7/130775572/1995399.pdfIn PDF document text
    • http://zmani.site/uploads/1/3/0/3/130379231/4598616.pdfIn PDF document text
    • http://boldnfearless.com/uploads/1/3/0/6/130639281/nujoxax-botuw-lopafekawudiba.pdfIn PDF document text
    • http://k0gyr.slpny.com/uploads/1/3/0/2/130292125/130292125.html#anthem+blue+cross+ct+prior+authorization+formIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000025fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25FD 7076 bytes
SHA-256: d8521727aa2088fffb15e1ed04a78c29006f1852967ad8b9357209cf423a9b17

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