Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51627a5ca62924c…

MALICIOUS

PDF

39.6 KB Created: 2020-03-21 18:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 5e7b42585698177b50a63392f19e7005 SHA-1: 19d7ddfb894df45924be1cca36e8f147a728bd8f SHA-256: e51627a5ca62924c832a95fe8f4101f2c61249db93bb64f08be4b853a044a13b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically slugged, indicating a link farm or SEO spam tactic. The document body, though partially corrupted, contains text related to a quality award and mentions the wkhtmltopdf generator, suggesting a lure to potentially malicious external sites. The primary heuristic identified a mass external PDF link farm, with 25 links generated, hosted on various domains. The IOCs are the URLs extracted from the document.

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://sweetestdreams.org/uploads/1/3/0/5/130589239/130589239.html#premio+europeo+a+la+calidad+modelo+efqm+de+excelencia PDF link annotation
    • http://www.justforfunphotography.net/uploads/1/3/0/4/130488197/jatibax.pdfIn PDF document text
    • http://polarisbdgsystems.com/uploads/1/3/0/2/130292104/406358.pdfIn PDF document text
    • http://skiautollc.com/uploads/1/3/0/3/130379627/jigogoxodedazubo.pdfIn PDF document text
    • http://appletonphoto.com/uploads/1/3/0/8/130874252/zejude-naxazazasuk-petumijakefi-pikijoleta.pdfIn PDF document text
    • http://hostmaster.sat-works.com/uploads/1/3/0/4/130483990/jinobetu_pirizorur.pdfIn PDF document text
    • http://mail.the-udder-preschool.co.uk/uploads/1/3/0/8/130814058/3f1640db28b.pdfIn PDF document text
    • http://drivesuperiorcarriers.com/uploads/1/3/0/7/130775531/jobozuvesazum.pdfIn PDF document text
    • http://www.rinjaniindah.com/uploads/1/3/1/0/131071111/2c5bf80.pdfIn PDF document text
    • http://wingsofmercyart.com/uploads/1/3/0/5/130588624/nasudug.pdfIn PDF document text
    • http://titanedtalk.com/uploads/1/3/0/9/130969594/xezoxanivober_nalepube.pdfIn PDF document text
    • http://www.togetherforthelongrun.com/uploads/1/3/0/6/130620563/768c02cf90524.pdfIn PDF document text
    • http://swkfrenchbulldogs.com/uploads/1/3/0/5/130547078/dekigukagukaku-noxovedipok.pdfIn PDF document text
    • http://www.missyfarless.com/uploads/1/3/0/7/130738641/0a5937a9cab91b1.pdfIn PDF document text
    • http://bariatric-psych.com/uploads/1/3/0/4/130483303/b77a7d687955f.pdfIn PDF document text
    • http://www.oasideibravi.org/uploads/1/3/0/7/130776026/5873032.pdfIn PDF document text
    • http://lovebirdarbors.com/uploads/1/3/0/6/130639300/d58ad72420393d.pdfIn PDF document text
    • http://mattkingsbury.org/uploads/1/3/0/6/130639530/2954109.pdfIn PDF document text
    • http://9f60lcb503.com/uploads/1/3/0/5/130545957/9348110.pdfIn PDF document text
    • http://alberthouseservices.com/uploads/1/3/0/4/130476740/3d5dfd51bd3af.pdfIn PDF document text
    • http://morishjems.com/uploads/1/3/0/5/130551249/aef329.pdfIn PDF document text
    • http://newhopephotographylakeland.com/uploads/1/3/0/6/130604338/lemabibipi-xajarogi.pdfIn PDF document text
    • http://spaldi.com/uploads/1/3/1/1/131164124/172056.pdfIn PDF document text
    • http://babygearrentalslu.com/uploads/1/3/0/7/130740617/535409.pdfIn PDF document text
    • http://southshorecompanioncare.com/uploads/1/3/0/6/130620314/lejupedukogom_dodefo.pdfIn PDF document text
    • http://killeenmasonry.com/uploads/1/3/0/5/130539738/1435976.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

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_off000070e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 7992 bytes
SHA-256: 6f4631d3cf7c8207df66d9e24144e5837e8847cbc653c23dd75bf95567d3f198

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