Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e14bfc8a10865d6…

MALICIOUS

PDF

37.1 KB Created: 2020-06-06 16:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: d5cffbcd552d1c84c5b372777319ca1e SHA-1: 0b270904f585e62a327a27abb8f9ab794769a7bf SHA-256: 7e14bfc8a10865d66d17ee5ff2a881a31922a7768e3774e1d37d71024dc625bf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to various domains, many of which appear to be dynamically generated or part of a link farm. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious nature of these links. The document body itself is largely unreadable but contains references to the book 'Psychology applied to work 10th edition', suggesting a potential lure.

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://webdisk.jessicamiyuki.com/uploads/1/3/1/3/131383314/131383314.html#psychology+applied+to+work+10th+edition PDF link annotation
    • http://essentialamerica.org/uploads/1/3/0/3/130323647/5361628.pdfIn PDF document text
    • http://usautomation-gates.com/uploads/1/3/0/7/130775727/kamewezof.pdfIn PDF document text
    • http://indyductrebateclaims.com/uploads/1/3/1/3/131383673/ff417514f.pdfIn PDF document text
    • http://jameelehshelo.com/uploads/1/3/0/8/130814479/0a8ab7.pdfIn PDF document text
    • http://mariejoseehull.com/uploads/1/3/0/5/130589186/bajupifin_rarik_zugewulobaxa_zapofezebig.pdfIn PDF document text
    • http://shoot-around.com/uploads/1/3/0/4/130489157/xitopunisexof.pdfIn PDF document text
    • http://fashiondollnetwork.com/uploads/1/3/1/1/131164564/6d9b1.pdfIn PDF document text
    • http://1969karmannghia.com/uploads/1/3/0/5/130588153/lubilozugulose_domezijavesosop.pdfIn PDF document text
    • http://promotemycandidate.com/uploads/1/3/0/4/130483041/kusidilekizar-janemagoxizu-petavol.pdfIn PDF document text
    • http://hostmaster.printartadv.com/uploads/1/3/0/9/130970005/d268ff340b3cd11.pdfIn PDF document text
    • http://ilo.co.nz/uploads/1/3/0/7/130739222/3080396.pdfIn PDF document text
    • http://webdisk.jessicamiyuki.com/uploads/1/3/1/3/131383314/terms.htmlIn PDF document text
    • http://webdisk.jessicamiyuki.com/uploads/1/3/1/3/131383314/dmca.htmlIn PDF document text
    • http://webdisk.jessicamiyuki.com/uploads/1/3/1/3/131383314/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://faxozolowof.files.wordpress.com/2020/06/firar.pdfIn PDF document text
    • https://xetepufupeso.files.wordpress.com/2020/06/pokufelilokukewubagovuj.pdfIn PDF document text
    • https://vabogojup.files.wordpress.com/2020/06/61155834376.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00004fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC6 10252 bytes
SHA-256: 36dd5e45279e255ad9d7f4fcb8f5ebf9f67cc8e3d72117b0b5f8e6fa2a13bafb
font_01_sfnt_off00007340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7340 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553

Open this report in the interactive analyzer, or submit your own file for analysis.