Malicious PDF — malware analysis report

Static analysis result for SHA-256 f175c90a1d8553a3…

MALICIOUS

PDF

35.3 KB Created: 2020-03-23 13:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a49c0e20b5be057d4d5d52061434f517 SHA-1: b51355817f3c8ad77a1f9fc45eefa0ba8c0e7ade SHA-256: f175c90a1d8553a354eff4ddbaaae0dba678995c46b54dc3c828ada5f23bb340
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The document body, though partially corrupted, contains a reference to a 'jacuzzi bathtub manual' and the authoring application 'wkhtmltopdf', suggesting a potential lure. No scripts were extracted from this sample.

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://bytecubed.io/uploads/1/3/0/6/130640136/130640136.html#jacuzzi+bathtub+manual PDF link annotation
    • http://panhandlesensoryinc.com/uploads/1/3/0/2/130271004/sotut.pdfIn PDF document text
    • http://bluemountainpaints.com/uploads/1/3/0/3/130313293/lovujikawure.pdfIn PDF document text
    • http://dubairhythmicgymnastics.com/uploads/1/3/0/6/130604885/6606552.pdfIn PDF document text
    • http://mrsottocounselingcorner.com/uploads/1/3/0/4/130483638/be295db8dd.pdfIn PDF document text
    • http://bigskysupply.shop/uploads/1/3/0/6/130639786/8121499.pdfIn PDF document text
    • http://monetdiamondscollection.com/uploads/1/3/0/3/130313063/kodumuxidajimutelu.pdfIn PDF document text
    • http://crossculturalkid.net/uploads/1/3/0/5/130543552/26077.pdfIn PDF document text
    • http://ymslivingston.com/uploads/1/3/0/4/130488410/joxezerudelu.pdfIn PDF document text
    • http://steveburrowsmusic.com/uploads/1/3/0/3/130313212/1169337.pdfIn PDF document text
    • http://www.timcomms.co.za/uploads/1/3/0/7/130739480/pubofowezelij.pdfIn PDF document text
    • http://cowdung.org/uploads/1/3/0/5/130539798/3dc82c.pdfIn PDF document text
    • http://admin.thestirnkorbcompany.com/uploads/1/3/0/6/130603834/4238117.pdfIn PDF document text
    • http://poderdediosministerio.org/uploads/1/3/0/7/130775935/9219671.pdfIn PDF document text
    • http://theforexsquare.com/uploads/1/3/0/5/130538866/dabuwujirowefot_zopomevivo_jetukutapu_lusugonefowino.pdfIn PDF document text
    • http://michaeljcbarlow.com/uploads/1/3/0/7/130776529/kadun.pdfIn PDF document text
    • http://loratadine10mgzog.greatwebsitebuilder.com/uploads/1/3/0/6/130639886/f93422d2.pdfIn PDF document text
    • http://superiorcubes.co.nz/uploads/1/3/0/4/130483741/nikopebaxi.pdfIn PDF document text
    • http://maternity-depot.net/uploads/1/3/0/2/130272232/b200b8.pdfIn PDF document text
    • http://varelasinvestments.com/uploads/1/3/1/0/131070356/gekeko_fefusiletunin_ledaz_sazawe.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 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_off0000616c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 7376 bytes
SHA-256: 4e1d35a705e7c1364ab1dc5bab679784b95e488455c56b82faedab6d69854cb8

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