Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccbc95b06c45d16…

MALICIOUS

PDF

54.2 KB Created: 2020-03-24 14:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: febb1d13254567a796e5b3dc676151dd SHA-1: 14e245ec02b1b29c0b8477669cca9ce77580a373 SHA-256: bccbc95b06c45d16ec168a5562375b59873ba6ca26810e24e63bddcee8112251
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, while containing some garbled text, includes the URL http://cryptoassets.xyz/uploads/1/3/0/5/130539309/130539309.html#linea+del+tiempo+delos+avances+cientificos+de+la+biologia, which is part of a link farm. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern of mass external PDF links, indicating a likely attempt to drive traffic to compromised or malicious domains.

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://cryptoassets.xyz/uploads/1/3/0/5/130539309/130539309.html#linea+del+tiempo+delos+avances+cientificos+de+la+biologia PDF link annotation
    • http://tastingfair.com/uploads/1/3/0/6/130604590/9873023.pdfIn PDF document text
    • http://bigalsfireworks.com/uploads/1/3/0/2/130291592/5817709.pdfIn PDF document text
    • http://mail.alexanderwenger.ch/uploads/1/3/0/2/130291635/2702839.pdfIn PDF document text
    • http://drstellamedicalintuitive.com/uploads/1/3/0/6/130621815/7fc13d.pdfIn PDF document text
    • http://andrewdpaterson.com/uploads/1/3/0/7/130738933/f4904f8.pdfIn PDF document text
    • http://pilatesbrienzseestark.com/uploads/1/3/0/5/130539702/cc58fba8b4a.pdfIn PDF document text
    • http://constitutionalteaparty.org/uploads/1/3/0/6/130605084/semepiwo.pdfIn PDF document text
    • http://kmclinicaltraining.co.uk/uploads/1/3/0/6/130620530/majovib_vedele_gazajazolubu.pdfIn PDF document text
    • http://store.arvadahistory.org/uploads/1/3/0/6/130621700/talafemopiz.pdfIn PDF document text
    • http://mercystreetchurch.com/uploads/1/3/0/6/130621285/tevajupezowebamoxa.pdfIn PDF document text
    • http://cobbspropertyservicesltd.com/uploads/1/3/0/5/130546283/vanekugajaved.pdfIn PDF document text
    • http://theclassicnc.com/uploads/1/3/0/2/130288320/8676300.pdfIn PDF document text
    • http://kosmokayla.com/uploads/1/3/0/8/130874001/mebofibakax_naxorege_dadotupuso_segit.pdfIn PDF document text
    • http://edifyyounow.com/uploads/1/3/0/6/130620346/powixipotutepasow.pdfIn PDF document text
    • http://smithpaintings.com/uploads/1/3/0/2/130272603/1382779.pdfIn PDF document text
    • http://graceturnerofficial.com/uploads/1/3/0/2/130288412/dukakase.pdfIn PDF document text
    • http://spiritjourney.org/uploads/1/3/0/7/130739459/9818508.pdfIn PDF document text
    • http://mentawhite.com/uploads/1/3/0/7/130739020/fevenuw-vobotemapafa.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 7

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_off000090a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A2 9744 bytes
SHA-256: fee80140c73987bf71b6ba8d020c77425e3cdfae96d74f1866b9f9ad67de9f69
font_01_sfnt_off0000b3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B1 16060 bytes
SHA-256: f19dc41d490b60033b52f2fdde74623f1ba9924597607807c173cf149651756c

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