Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed73cc9d8d2b2241…

MALICIOUS

PDF

49.9 KB Created: 2020-03-28 10:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 9d52be550fa00c3d13b46e9ba5fa5f83 SHA-1: 8d28f11e46691bd81ed1612a8df7a1db1f61de68 SHA-256: ed73cc9d8d2b2241c2b7ffefdd9a1beca03023b6957ce56d81d3276d9bbab336
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 point to similarly structured URLs on different domains, indicating a link farm. The document body, though partially corrupted, contains text related to Spanish words with dieresis and mentions wkhtmltopdf, suggesting a deceptive lure. The primary heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links, and the ML classifier strongly indicates maliciousness.

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://allanangelprinting.com/uploads/1/3/1/3/131383945/131383945.html#palabras+con+dieresis+en+espa%C3%B1ol+ejemplos PDF link annotation
    • http://nashvillebodyworker.com/uploads/1/3/0/6/130603814/topepazivi-tazigapufoge.pdfIn PDF document text
    • http://www.oneformother.org/uploads/1/3/0/2/130287937/dakojewim_mofodupa_popiw.pdfIn PDF document text
    • http://knockoutsdesign.com/uploads/1/3/0/6/130639659/lijitusu.pdfIn PDF document text
    • http://dkfuneralphotography.com/uploads/1/3/0/7/130776489/vatakidolosokusu.pdfIn PDF document text
    • http://fantomspain.com/uploads/1/3/0/6/130639397/1201270.pdfIn PDF document text
    • http://www.cdtacjohnsoncontractorsinc.com/uploads/1/3/0/5/130589054/9774719.pdfIn PDF document text
    • http://orbum.org/uploads/1/3/0/5/130543272/4415553.pdfIn PDF document text
    • http://calvinpennywelljr.com/uploads/1/3/0/7/130775393/sixilojozexexizob.pdfIn PDF document text
    • http://aggressivelyintelligent.band/uploads/1/3/0/6/130621303/fojabika.pdfIn PDF document text
    • http://nwwritingteachers.org/uploads/1/3/0/9/130969871/zobazi.pdfIn PDF document text
    • http://miriamscleaningservice.com/uploads/1/3/0/6/130620279/204b5f281.pdfIn PDF document text
    • http://karish.com/uploads/1/3/0/8/130813496/sukafuwuw-mutepim-gujanub.pdfIn PDF document text
    • http://jahzaeboutique.com/uploads/1/3/0/6/130621814/bikomod.pdfIn PDF document text
    • http://alleylouisville.com/uploads/1/3/0/5/130588987/bivufoda_xomawugelali_govigos_govezelotonog.pdfIn PDF document text
    • http://www.vamatabeauty.com/uploads/1/3/0/5/130550868/1bfe4.pdfIn PDF document text
    • http://nw2.me/uploads/1/3/0/6/130604168/fufitofokuran.pdfIn PDF document text
    • http://heardandunderstood.org/uploads/1/3/0/7/130776068/1bb380a720.pdfIn PDF document text
    • http://tamarackvalleyfarm.com/uploads/1/3/0/5/130551103/be08a26b3c.pdfIn PDF document text
    • http://decartrailer.com/uploads/1/3/0/6/130621701/rojatukefug_mibap_susulod_goxarer.pdfIn PDF document text
    • http://www.helenbeelen.com/uploads/1/3/0/7/130740163/tigut.pdfIn PDF document text
    • http://danaroberts.com/uploads/1/3/0/4/130483329/degoj.pdfIn PDF document text
    • http://towerpictureframing.com/uploads/1/3/0/5/130588644/paxeg-gawokesawoj.pdfIn PDF document text
    • http://www.hillelatvcu.org/uploads/1/3/0/7/130739786/b76332.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 2

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_off00007af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 10984 bytes
SHA-256: 61945fd03a201e29ba4a65f1f297c92b68a3d1c1db287068a9e607ca882ca17c
font_01_sfnt_off0000a201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA201 16168 bytes
SHA-256: 357552ae08a23570c1046dac339dfdd27a5f0958d3de89253302bfe547abed3b

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