Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dac6d5ca1b1088…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 10:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 903e60017b864ef365c88be39c786b92 SHA-1: 145367dcf1be8b51bf282ccee5a96c30239483ec SHA-256: e5dac6d5ca1b1088c2ec552937a723dffec805b15ce5d630fe49d74c53c3fa43
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=house+of+night+series+for+sale PDF link annotation
    • http://fajujefa.getenjoyment.net/taco_bell_chipotle_sauce_nutrition_facts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_601b0dea73596.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/54249328721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_603165ae667c9.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/9th_and_10th_class_pak_study_mcqs.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/jjRdS1x/sezovutukoripi.pdfIn PDF document text
    • http://lagujegivupani.22web.org/fuzetojujobexi.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/contract_law_principles_cases_and_legislation.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/idiots_guide_to_alchemy_download.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/ocarina_of_time_songs_on_recorder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibogifimot.epizy.com/19962683101.pdfIn PDF document text
    • http://vetageluzox.rf.gd/verizon_dsl_router_default_login.pdfIn PDF document text
    • http://kexijilavagela.rf.gd/ncert_class_9_biology_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 4988 bytes
SHA-256: e446f1bf3a708a9ab7e8a277f82f66bfeb64c493d4263b0b54b4dd32568bfc50
font_01_sfnt_off0000fb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 10480 bytes
SHA-256: 78556ae1223408ea26898befe21bd56ef03c53ef337e4ba0cf0cd956a8ad0165