Malicious PDF — malware analysis report

Static analysis result for SHA-256 0209673175b46470…

MALICIOUS

PDF

39.4 KB Created: 2020-06-30 08:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: f88a67986fc377a939651b8617bd845b SHA-1: c715da00ae13fc6751dc5834e77ce842b2d08b30 SHA-256: 0209673175b464704ef518bd4325548888d68ce50a6abe35e22c4033720774a9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified as a 'link farm' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous URLs and the PDF structure indicate a likely attempt to distribute or host malicious payloads.

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://files.bimpca.com/uploads/1/3/0/3/130379757/130379757.html#esc+guidelines+non+cardiac+surgery PDF link annotation
    • http://onthehuntmosquitocontrol.com/uploads/1/3/0/6/130621746/vewimivorozozigezasa.pdfIn PDF document text
    • http://autodiscover.knobnosterfcc.com/uploads/1/3/0/6/130621973/8607525.pdfIn PDF document text
    • http://bellovaporizer.com/uploads/1/3/0/7/130775241/janujelider.pdfIn PDF document text
    • http://perthchurchofchrist.com/uploads/1/3/0/4/130476458/6855658.pdfIn PDF document text
    • http://files.archangelsschool.ca/uploads/1/3/1/4/131453713/85cf9.pdfIn PDF document text
    • http://nmarphotog.com/uploads/1/3/1/1/131164311/738241.pdfIn PDF document text
    • http://files.leveldek.com/uploads/1/3/0/2/130272524/fugidunokebesam_kidorigodugitam_wozabapojerif.pdfIn PDF document text
    • http://aspectplumbingindustries.org/uploads/1/3/1/8/131872281/fa66c09.pdfIn PDF document text
    • http://madebyewe.co.uk/uploads/1/3/1/4/131437294/98f74ae66ec.pdfIn PDF document text
    • http://missouriyouthrugby.org/uploads/1/3/0/5/130588187/7135198.pdfIn PDF document text
    • http://mail.ehrlichhomes.com/uploads/1/3/0/6/130604531/889994.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zokuvadezod.files.wordpress.com/2020/06/dojuvuzudunaviwosa.pdfIn PDF document text
    • https://kudivex.files.wordpress.com/2020/06/51580505111.pdfIn PDF document text
    • https://tokejar.files.wordpress.com/2020/06/vudeb.pdfIn PDF document text
    • https://zisiwemebix.files.wordpress.com/2020/06/bivuzaloro.pdfIn PDF document text
    • https://kedojisap.files.wordpress.com/2020/06/mufuwesijelexi.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://scripts.sil.org/OFLIn PDF document text

Related samples 1

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_off00005bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEF 4968 bytes
SHA-256: 148c701972e846ef0673d1a8aa954cffe87f16fdb31c3c86eb04340477ff5f86
font_01_sfnt_off00006cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD7 10500 bytes
SHA-256: 2c3d069c3834a9a64666c5d13fd88922d33bfeea1cb57253c2098ad7442ee121

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