Malicious PDF — malware analysis report

Static analysis result for SHA-256 658ea538a320ab58…

MALICIOUS

PDF

42.8 KB Created: 2020-06-08 15:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6e05a65b9b27dadd8554719a41a6433 SHA-1: dafabdf9028a3b1dc0db1ce071e031ae23e4fcc0 SHA-256: 658ea538a320ab58745952c97d71d9458e110ad5dd65c1f62dd12d04b77000f0
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 by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains URLs that are also listed in the extracted URLs. These links likely lead to further malicious content or are part of an SEO poisoning scheme. No scripts were extracted, but the presence of numerous external links suggests a watering hole or phishing-like attack vector.

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://nurserygardenhawaii.com/uploads/1/3/0/5/130590235/130590235.html#deleuze+guattari+o+que+%25C3%25A9+filosofia
    • http://walkcycleconnect.co.uk/uploads/1/3/0/8/130813913/6694883.pdf
    • http://clintoncloud.com/uploads/1/3/0/2/130273893/2923568.pdf
    • http://jamelpenprodigy.com/uploads/1/3/2/3/132303001/mebif-misada.pdf
    • http://mta-sts.mx.bodyworkbybarb.com/uploads/1/3/1/6/131606636/piwarozunuz_seteke_rujafoforofo.pdf
    • http://dopephotovideo.com/uploads/1/3/0/7/130739936/2907f3684b11.pdf
    • http://daisiesandsunflowers.com/uploads/1/3/1/0/131069863/tinetopemizuv.pdf
    • http://capsulelifestyleinc.com/uploads/1/3/0/2/130271087/910f752c95d0dd.pdf
    • http://nahomiichino.com/uploads/1/3/0/2/130287929/3272094.pdf
    • http://thenightmarehauntedhouse.com/uploads/1/3/1/6/131637077/dorudafewo.pdf
    • http://ravenstedefarms.com/uploads/1/3/0/3/130313183/fc4c6ef3.pdf
    • http://hostmaster.stephan-orth.de/uploads/1/3/0/2/130271095/20433.pdf
    • http://askachampion.com/uploads/1/3/0/9/130969659/soxitus.pdf
    • http://travelex1.com/uploads/1/2/9/6/129643752/129643752.html?hp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://baveruboziza.files.wordpress.com/2020/06/vagetekuzeze.pdf
    • https://jupeveni.files.wordpress.com/2020/06/93474739950.pdf
    • https://zadidepetox.files.wordpress.com/2020/06/73035912989.pdf
    • https://keganuforuro.files.wordpress.com/2020/06/99336026920.pdf
    • https://misabidi.files.wordpress.com/2020/06/ganexebifukaxatuvagowejof.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755d.bin
0af9480929c535a64d0b6b180ce05f73607f49fb16ecef0a4e460a23c1807009
pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 13420 bytes