Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed9d4d37470b444…

MALICIOUS

PDF

49.5 KB Created: 2020-04-03 12:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 63449bbe104f86cd634a29c50dc82b3e SHA-1: f8e21da5575dcd129970bbce8f9b8a761f025d0f SHA-256: aed9d4d37470b444f5c84dd6305b35641bcff76a52e509c0682e2ebc76a35ae7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a mass of external PDF links. The embedded URLs point to various PDF documents on different domains, suggesting a coordinated effort to redirect users. 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://ndtasanantonio.org/uploads/1/3/0/6/130604377/130604377.html#project+management+for+engineering+business+and+technology+5th+edition+solution+manual PDF link annotation
    • http://doorandwindowplus.com/uploads/1/3/0/6/130639997/959252.pdfIn PDF document text
    • http://swintechtrw.net/uploads/1/3/0/5/130589035/c2c9ffd6b07.pdfIn PDF document text
    • http://percussify.com/uploads/1/3/0/3/130313398/1b659643a569.pdfIn PDF document text
    • http://26thwardalderman.com/uploads/1/3/0/6/130639205/fodatu.pdfIn PDF document text
    • http://raleighvalueaddfinancing.com/uploads/1/3/0/4/130476565/681461.pdfIn PDF document text
    • http://allroundtreeservice.com/uploads/1/3/1/4/131453259/980547.pdfIn PDF document text
    • http://rollershadeiq.com/uploads/1/3/1/0/131070559/f3b634fb4a6.pdfIn PDF document text
    • http://spigotscience.com/uploads/1/3/0/6/130604192/dilafadovirawejoza.pdfIn PDF document text
    • http://integritymarketing4u.com/uploads/1/3/0/7/130739224/bopofebiniwujiwakoge.pdfIn PDF document text
    • http://petervazquez.org/uploads/1/3/0/5/130551176/mawonupukitemudu.pdfIn PDF document text
    • http://davidspaintingcompany.com/uploads/1/3/1/0/131071047/6160393.pdfIn PDF document text
    • http://lifeisketoofficial.com/uploads/1/3/0/2/130272886/7229410.pdfIn PDF document text
    • http://aechungdesign.com/uploads/1/3/0/5/130588988/nosuvaf_xofiluz_jitunekanufam_xagavigi.pdfIn PDF document text
    • http://canndeco.com/uploads/1/3/0/6/130639538/5075063.pdfIn PDF document text
    • http://mosaicfaith.org/uploads/1/3/0/7/130775676/jomenibep_mupenedito_jupuwuxavasuf_gitonuseguliz.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FE 8236 bytes
SHA-256: 7a2552959c755d5157c0c5f9c5eb2408747f45e593ea6aad9f394577aa5fae6c
font_01_sfnt_off000095cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CC 4068 bytes
SHA-256: 66495800c3033db752395888c57a2472d7780c6e20f93c23d8607484346c200d
font_02_sfnt_off0000a282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA282 16036 bytes
SHA-256: ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4

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