Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd05ed8d8a89f24…

MALICIOUS

PDF

124.6 KB Created: 2021-03-26 00:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ec073e9fae09f33d6f58a9ed9beeaefd SHA-1: 6b4ad63bc450eb8f25f6d93e74a0947fd079eec8 SHA-256: 9bd05ed8d8a89f24b6487653bdc6e4cda43eed34a13c8cd0b3f0d4df1367cd60
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with several pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://baarspo.ru/aws?utm_term=dark+souls+2+dlc+walkthrough+old+iron+king PDF link annotation
    • https://cdn.sqhk.co/manaruparil/akX14hc/dexarajes.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/soil_biota.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/risedovimodibi.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/ODx7Ljj/52295284284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5fde2bcb3026e.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/sekotekiduxofunisowuto.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavazer/jawjhPy/terraria_pickaxe_power_list.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/iajeifh/kajimexab.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/refamiwalurolaroledu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fc9ecbccb535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5ff3e1418d236.pdfIn PDF document text
    • https://cdn.sqhk.co/lirotigi/ichehjb/android_studio_install_app_on_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4e96147b-f61c-4581-abee-56fd949ab654/toxarej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fc5a5c-0c19-48d3-9c3e-13748c6e161e/51312726268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fe810e-1b85-450a-91af-2ff2f647fc42/pefaxikidozamipomema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d72184-b7bf-4ef1-8f9e-968e18a8cd3b/22539282742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1f5a0a-a098-4c21-bc2a-cafc2cc87ff0/ireland_mailing_address.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/sword_art_online_games_xbox.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/laxokasidupibovaxivununuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6199230-3d07-498a-b582-1fc2db7d8bb6/lilola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88080325-da42-4d92-9f27-b573676cab6b/der_kleine_hobbit_ebook_free_download.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/85396137456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c327fb95-b325-46ef-be6b-ee60831e7329/jonurerefudapojup.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E4E 6572 bytes
SHA-256: 1a6f7c52ac0a0d1b794158eada998e5d85fd1b4d9dce419f27238387b729cbcf
font_01_sfnt_off00018e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E64 3312 bytes
SHA-256: ac66ddecb1889e99694234647e4a1e19b6174440e696c9ee44c6cb9711419273
font_02_sfnt_off00019a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A45 5252 bytes
SHA-256: 0eb656f72e921df9ce5a8c7956d9e178d492c201a0f15f62a0368ee8cb45cfc7
font_03_sfnt_off0001ac2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC2F 12756 bytes
SHA-256: 253cc6bcdfd432adfe70ade9d3efe856f0d5caf477cc383866baaf716201a5fe
font_04_sfnt_off0001d4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4AA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c