Malicious PDF — malware analysis report

Static analysis result for SHA-256 defe77965347b9cc…

MALICIOUS

PDF

46.4 KB Created: 2020-03-29 21:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b927ffab4a2750bd65a7260d8df5d37f SHA-1: 9b711c0284f7e80e8d2229d58116aebac533bb7c SHA-256: defe77965347b9ccc2bfaf74c058fb30d5c330252c61ca8ce1bdf4e9baf93452
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which follow a pattern of numeric slugs and are hosted on newly created domains. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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://woodlandstuition.com/uploads/1/3/1/3/131379685/131379685.html#formula+de+longitud+en+quimica PDF link annotation
    • http://covenanthealthcareservices.com/uploads/1/3/1/0/131070847/kabesesatafurakinaxa.pdfIn PDF document text
    • http://lovejoylegal.com/uploads/1/3/1/3/131398444/0fe860e6193c.pdfIn PDF document text
    • http://dogberrytheatre.org/uploads/1/3/0/6/130640015/ramanoko_jemewumufudepa_wifeveboxox_ruvidovez.pdfIn PDF document text
    • http://bach-institut.ch/uploads/1/3/0/7/130775118/675d91aee2bc.pdfIn PDF document text
    • http://multifamilygroup.net/uploads/1/3/1/1/131163616/9484529.pdfIn PDF document text
    • http://theworldunplugged.org/uploads/1/3/0/4/130476216/4907262.pdfIn PDF document text
    • http://rossellcicservicesllc.net/uploads/1/3/1/3/131380163/jenijubeni-nefejovofeb-wigepesaxamezi.pdfIn PDF document text
    • http://robynvalerieprice.com/uploads/1/3/0/8/130873801/31b3f06429cb.pdfIn PDF document text
    • http://myspend.net/uploads/1/3/0/7/130739696/lumotabut.pdfIn PDF document text
    • http://nannytherapy.net/uploads/1/3/0/6/130620362/tuzuvud-xesewabipubeja-walanusowoxomek-rixadutetaz.pdfIn PDF document text
    • http://szjsolutions.com/uploads/1/3/0/5/130550951/jezuxa.pdfIn PDF document text
    • http://mk-shots.com/uploads/1/3/1/4/131438188/zesiluneke_bevululilosokaw_mijolizixepevuj_tanub.pdfIn PDF document text
    • http://flowergurlz.com/uploads/1/3/0/6/130603810/gufofofegodoxu.pdfIn PDF document text
    • http://dunaewilliams.com/uploads/1/3/0/4/130476978/fejali_monegusinuga_bedelogojuginig_gaduxeko.pdfIn PDF document text
    • http://gavehgani.com/uploads/1/3/0/5/130588786/nuzef_pabitil.pdfIn PDF document text
    • http://beyoutifullymademh.com/uploads/1/3/0/2/130272250/753954.pdfIn PDF document text
    • http://kjeemusic.com/uploads/1/3/0/6/130639566/4803f25ca4c9c3b.pdfIn PDF document text
    • http://strategicinsightadvisors.net/uploads/1/3/0/5/130545681/8946643.pdfIn PDF document text
    • http://londontideway.org/uploads/1/3/0/6/130621900/tulezivitede.pdfIn PDF document text
    • http://freerangefouchefamily.com/uploads/1/3/0/4/130477293/9e0db7978a1.pdfIn PDF document text
    • http://susandumett.com/uploads/1/3/0/4/130476378/2039051.pdfIn PDF document text
    • http://realtalkwithricki.com/uploads/1/3/0/4/130478244/570338.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 9788 bytes
SHA-256: 3f36f693b0792d831bf6037de53f895174a982b70a1f24645c318cf947fae525
font_01_sfnt_off00009662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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