Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71848c1eac60c3d…

MALICIOUS

PDF

35.6 KB Created: 2020-03-24 04:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 4d1b9734b3c25a2998b165b27e500b6f SHA-1: 3219bd12c264cd1d2f2c762a611153c2922f020d SHA-256: c71848c1eac60c3d45bd01767f391a33866947d0664740d4863d5c3477bd6f96
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDFs hosted on various domains, indicating a link farm or redirection scheme. The document body is heavily obfuscated but contains a URL that appears to be part of this scheme. No scripts were extracted from this sample. The primary attack pattern involves leveraging a network of SEO-optimized PDF links to potentially distribute further malicious content or generate traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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://balloonsandbitz.com/uploads/1/3/0/2/130272853/130272853.html#1+sen+berapa+rupiah+di+indonesia PDF link annotation
    • http://naturallog.net/uploads/1/3/0/6/130604744/1579938.pdfIn PDF document text
    • http://peacenfreedom.com/uploads/1/3/0/6/130603975/4433119.pdfIn PDF document text
    • http://canadian-photography.ca/uploads/1/3/0/7/130740206/fad45c79d.pdfIn PDF document text
    • http://experienceflavour.com/uploads/1/3/0/6/130639949/nuxulipinobuv.pdfIn PDF document text
    • http://putzen-fuer-sie.ch/uploads/1/3/0/6/130639652/1876530.pdfIn PDF document text
    • http://nuovatlantide.com/uploads/1/3/0/7/130776022/4608769.pdfIn PDF document text
    • http://blackthoroughbred.com/uploads/1/3/0/6/130604599/perifawifupizuxuroto.pdfIn PDF document text
    • http://ministrypartnersfunding.net/uploads/1/3/0/6/130639840/rebetatavaj.pdfIn PDF document text
    • http://www.simmondsbookkeeping.com/uploads/1/3/0/6/130604425/jugebubo_zutadaxekoxu.pdfIn PDF document text
    • http://www.lanternsgame.net/uploads/1/3/0/3/130323100/0e09a5ea690dc.pdfIn PDF document text
    • http://www.gamesfurniturefactory.com/uploads/1/3/0/7/130738753/7255310.pdfIn PDF document text
    • http://adniltonalves.com/uploads/1/3/0/2/130289246/8131725.pdfIn PDF document text
    • http://breimhurst.com/uploads/1/3/0/3/130313141/7120fd81.pdfIn PDF document text
    • http://patsytminkcenterforbusinessleadership.org/uploads/1/3/0/6/130639249/kuxenexumal.pdfIn PDF document text
    • http://mta-sts.buduar.pl/uploads/1/3/0/7/130775623/5134369.pdfIn PDF document text
    • http://9f60dmh002.com/uploads/1/3/0/6/130639471/826d39a.pdfIn PDF document text
    • http://artsandcraftsbaits.com/uploads/1/3/0/5/130588675/46664.pdfIn PDF document text
    • http://meredithbledsoephd.com/uploads/1/3/0/2/130289335/xopivoboboliwag-vudagu.pdfIn PDF document text
    • http://advancedrcs.com/uploads/1/3/0/6/130603748/2194453.pdfIn PDF document text
    • http://mochagirlbasement.com/uploads/1/3/0/6/130604874/bogeku-wakese-demujaxofifeni.pdfIn PDF document text
🗂 Part of campaign: canadian-photography.ca 4 samples

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