Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2b4a9b5c295605…

MALICIOUS

PDF

45.9 KB Created: 2020-03-29 21:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 50c525f1b092d3f7d105a418888c4260 SHA-1: 4224205cacdcc224a789c8af3e7f4e818aae3190 SHA-256: de2b4a9b5c295605341ebd13b3d5fb37445ffe26fab45212e3d842b1a46b0706
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body text is minimal and appears to be obfuscated, but it does contain a URL that matches one of the extracted links. This suggests a link farm or redirection scheme designed to lead users to potentially malicious content. 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://74-123-76-212.mgwnet.com/uploads/1/3/0/6/130620982/130620982.html#diagrama+presion+entalpia PDF link annotation
    • http://divasdoingbusiness.com/uploads/1/3/0/6/130639953/lorojuwedefajezututa.pdfIn PDF document text
    • http://riskyaccessory.com/uploads/1/3/0/7/130776462/mizafukezeduw_regakazuv.pdfIn PDF document text
    • http://srgonline.us/uploads/1/3/0/7/130776407/9476597.pdfIn PDF document text
    • http://tulumexpress.com/uploads/1/3/0/6/130604788/zamur.pdfIn PDF document text
    • http://bbluntsheabutter.shop/uploads/1/3/0/6/130620371/zaduk_legemajujopuf_tirix_zuxejaxofe.pdfIn PDF document text
    • http://summitcapitalco.com/uploads/1/3/0/6/130604141/9955938.pdfIn PDF document text
    • http://chineseerbes.com/uploads/1/3/0/7/130739303/suxulogenonogik_jagovosedip_koviwelabepabu_radenilobuwo.pdfIn PDF document text
    • http://usgsafetysecurity.info/uploads/1/3/0/5/130538836/fusobolopimofove.pdfIn PDF document text
    • http://guidancebylori.org/uploads/1/3/0/5/130545484/pabisafa.pdfIn PDF document text
    • http://skycruizair.com/uploads/1/3/0/3/130379226/lunowekix-mepadar-mafojadapij-zusowole.pdfIn PDF document text
    • http://lylajprojectmanagement.com/uploads/1/3/0/7/130775205/3962977.pdfIn PDF document text
    • http://scottdickeyphotography.com/uploads/1/3/0/4/130477085/11209.pdfIn PDF document text
    • http://chinabankunion.com/uploads/1/3/1/3/131379945/8894fd8.pdfIn PDF document text
    • http://mammothmine.com/uploads/1/3/0/5/130589237/gofopif-voluf.pdfIn PDF document text
    • http://indianapolisfloorsanders.com/uploads/1/3/1/1/131163976/f1e1d2ac7442.pdfIn PDF document text
    • http://kingdomincreaseministries.org/uploads/1/3/0/9/130969327/gitonamiw_buvidafavo_fudefefiwiwe_garasodubera.pdfIn PDF document text
    • http://madlat.ca/uploads/1/3/0/8/130813458/6b8650533ef9f2a.pdfIn PDF document text
    • http://thebreakuppodcast.com/uploads/1/3/0/2/130270843/3228026.pdfIn PDF document text
    • http://overtongateway.com/uploads/1/3/0/9/130969459/6942759.pdfIn PDF document text
    • http://wingsnmotion.com/uploads/1/3/0/8/130873890/1cc5b3bfa74f.pdfIn PDF document text
    • http://southern-webdesign.com/uploads/1/3/0/5/130551487/gamipumagaja.pdfIn PDF document text
    • http://maosport.net/uploads/1/3/0/4/130488832/6520724.pdfIn PDF document text
    • http://upd0te-mygres.com/uploads/1/3/0/6/130639636/lufat-wuwewo-gesag.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
🗂 Part of campaign: douglasenoblepainting.com 5 samples

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000752b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752B 9052 bytes
SHA-256: 4c2dc614cea6f14496f3acdb1157d8874f9230a64334f4f6c43eda6fca4c5a64
font_01_sfnt_off0000953f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953F 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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