Malicious PDF — malware analysis report

Static analysis result for SHA-256 48eea0b79245e291…

MALICIOUS

PDF

73.9 KB Created: 2021-03-07 03:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a822fd1e914b740172cce479c19b4e5 SHA-1: a7cc971b16eb68200d067528ad6334e31d0e8498 SHA-256: 48eea0b79245e291b7a3e7a1bcf301eba3a87a54d1d80c0fc2d9b70f01866f01
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to a 'service manual', likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=2002+rsx+service+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fe21dee20570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_5fd64ff0e0e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_6034456abaefb.pdfIn PDF document text
    • http://pubgucbayim.com/dopebekuxexijerexufirolixj836d.pdfIn PDF document text
    • http://gonzo-3d.com/86422175830jm5zd.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/bogie_de_train.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_60109505c6b12.pdfIn PDF document text
    • http://losqutoq.online/505386624135t22b.pdfIn PDF document text
    • http://xilagima.66ghz.com/food_accompaniments_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_60248cd063692.pdfIn PDF document text
    • http://netzamka.ru/zamevoxxen.pdfIn PDF document text
    • http://dezlice.ru/what_does_chicken_have_come_home_to_roost_meanqtz3x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadedizori.epizy.com/miniclip_game_bubble_trouble.pdfIn PDF document text
    • http://xojorefalez.rf.gd/bethesda_bug_report.pdfIn PDF document text
    • http://felawikemuda.epizy.com/wazef.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/sirogonodijirefekum.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/12986760318.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/how_to_analyse_data_in_research_proposal.pdfIn PDF document text
    • http://kowuvemanavo.rf.gd/japanese_crane_game_guide.pdfIn PDF document text
    • http://sijurajogo.epizy.com/42312869696.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/citizens_insurance_underwriting_guidelines.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5608 bytes
SHA-256: 2f345bcc2e6a0db7723006079629eb2e1ceb98c594953720abad416c96e1bbc4
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 10608 bytes
SHA-256: 320022fcdb389e721240ece242c0953bac0257720fd4b9ac776d40c94678e320

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