Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee14dfdb9ce12e1…

MALICIOUS

PDF

75.7 KB Created: 2021-02-22 22:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 88829420795589bbef2b3ce801c040df SHA-1: 488b713f4b43d3bf5f7712774f3c627b9322329b SHA-256: 8ee14dfdb9ce12e1ca098ab4198e633249269f7ac863ea9a13466403140551ec
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains multiple heuristics indicating a link farm and a lure for fake invoices or payment requests. The document body, though heavily obfuscated, suggests a context related to identification marks and potentially a download lure. The presence of numerous external URLs, including one pointing to a disposable hosting service, further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=visible+identification+marks+adalah PDF link annotation
    • http://axecheat6.xyz/what_is_the_game_unravel_aboutx8thu.pdfIn PDF document text
    • http://skidki-day.store/wizatuwuxamojo5ybl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5fdb2242e747d.pdfIn PDF document text
    • http://magicwoolshop.com/883433664667yr2l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/welding_workshop_manual.pdfIn PDF document text
    • http://xepujeroniwazip.epizy.com/sql_server_management_studio_2015_free.pdfIn PDF document text
    • http://zixoridepub.rf.gd/dataquest_cheat_sheet_pandas.pdfIn PDF document text
    • http://xutarefes.epizy.com/android_one_devices_update.pdfIn PDF document text
    • http://kutidonufeguvuz.rf.gd/finite_element_analysis_jobs_remote.pdfIn PDF document text
    • http://pakatikik.epizy.com/11871495682.pdfIn PDF document text
    • http://ravurewabaku.epizy.com/vewiwigunaliso.pdfIn PDF document text
    • http://kobewanen.rf.gd/chennai_express_lungi_dance_song_free.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 5428 bytes
SHA-256: 1636a452a03a5bc5e61e4012d5a6a178a062b74d05634e0ee00a18c43f33ebdc
font_01_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 10476 bytes
SHA-256: d9892068b3865c59704df951f63e30dd81fba6af9745de0b2a420bb9eb3d2012