Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b9ba9f5d62e51a…

MALICIOUS

PDF

53.5 KB Created: 2020-03-24 20:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: 9b823e64f309508acbebf8b49aaa239c SHA-1: 7740e3c1480f3dd60ce76eb2ec87817856816cfe SHA-256: c3b9ba9f5d62e51a45ee9f670bd307a977fa500de47e9fa639293697736c9465
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be directing users to a wide array of external resources, potentially for SEO manipulation or to serve as a landing page for further malicious activity.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://hardhathomeinspection.com/uploads/1/3/0/7/130740363/130740363.html#fue+poeta+vanguardista+espa%C3%B1ol+juan PDF link annotation
    • http://www.youneverthought.com/uploads/1/3/0/3/130379362/buzuguza-zivupasidirino.pdfIn PDF document text
    • http://dan-lynch.com/uploads/1/3/0/7/130775763/xojozeforexawilutoba.pdfIn PDF document text
    • http://bubblesquad.net/uploads/1/3/0/6/130620467/3902176.pdfIn PDF document text
    • http://toming90.com/uploads/1/3/0/5/130590482/moxam_zoberer_bitotelivuzew.pdfIn PDF document text
    • http://flyfishingteamusa.org/uploads/1/3/1/1/131164052/e83f66178d0309.pdfIn PDF document text
    • http://realtorhomesolutions.net/uploads/1/3/0/7/130739996/pojasekejavon.pdfIn PDF document text
    • http://www.urban-elegancee.com/uploads/1/3/0/4/130488251/tazabezif.pdfIn PDF document text
    • http://www.ehsankhaleghipro.com/uploads/1/3/0/6/130604101/jujamovoz.pdfIn PDF document text
    • http://www.robshadow.com/uploads/1/3/0/2/130270752/vilatam.pdfIn PDF document text
    • http://andrewslawncare.org/uploads/1/3/0/8/130814229/60e714ee30e8f.pdfIn PDF document text
    • http://www.ahindo.online/uploads/1/3/0/8/130814129/6140783.pdfIn PDF document text
    • http://scottscommercialservices.com/uploads/1/3/0/8/130814347/7166939.pdfIn PDF document text
    • http://hostmaster.newyorker.beer/uploads/1/3/0/2/130289431/2a018b78c.pdfIn PDF document text
    • http://martinautoplacement.com/uploads/1/3/0/7/130739210/4156956.pdfIn PDF document text
    • http://pertego.com/uploads/1/3/0/2/130291588/jawolaxaza_mejebawepuk_jimav.pdfIn PDF document text
    • http://mishareads.com/uploads/1/3/0/4/130435791/disevibuv.pdfIn PDF document text
    • http://i-systemsmw.net/uploads/1/3/0/9/130969840/b297d590ffa.pdfIn PDF document text
    • http://durancocontracting.com/uploads/1/3/0/4/130489090/60b7862523d.pdfIn PDF document text
    • http://agilitytg.com/uploads/1/3/0/5/130588376/d82839b.pdfIn PDF document text
    • http://www.stormwatchnorth.net/uploads/1/3/0/4/130476076/1723826.pdfIn PDF document text
    • http://ozanoner.com/uploads/1/3/0/5/130539940/rutulano.pdfIn PDF document text
    • http://thepalominohawaii.com/uploads/1/3/0/6/130603979/3760689.pdfIn PDF document text
    • http://radicallyawakenedmasters.com/uploads/1/3/0/3/130313427/b97fd0f322a.pdfIn PDF document text
    • http://3505brunell.net/uploads/1/3/0/5/130551832/c79a13f2c75669.pdfIn PDF document text
    • http://chagrinfanexpress.org/uploads/1/3/0/6/130620438/lupetebisodigewoze.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
🗂 Part of campaign: 3505brunell.net 8 samples

Related samples 2

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_off0000a421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA421 9500 bytes
SHA-256: 03a4179197236cfce67a813a676df7c7893fbca590bb8340480400ca3693c584

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