Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e7d4e1102f7978…

MALICIOUS

PDF

78.2 KB Created: 2021-01-30 02:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 55b67fd5557794e58063ff76ced34285 SHA-1: 3b6b20f03d618b6eeba94272fd569f6659581558 SHA-256: 47e7d4e1102f797891bf00e0859256b025b25da6549d07c69d3d0279748b1695
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a compromised site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

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://bologen.ru/wb?keyword=green%20party%20platform%20healthcare PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fe9c4483c796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410000/normal_600034fa39101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_600cced5e2724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_5fd9d8cc02dda.pdfIn PDF document text
    • http://zemimumaloger.iblogger.org/batunawajojukudimateje.pdfIn PDF document text
    • http://rivuxini.66ghz.com/wegewabepabonoven.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_600575f8cb989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487902/normal_5ff1978e17a45.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/welumamilivedamounaqq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494429/normal_5ff9697883b40.pdfIn PDF document text
    • http://jilet1.club/10284584466b81vh.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/wovugi/suxez.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/cafeland_hack_apk_2018.pdfIn PDF document text
    • http://zevomes.rf.gd/tobebulap.pdfIn PDF document text
    • http://vunefukovamin.rf.gd/emulator_pokemon_black_and_white.pdfIn PDF document text
    • http://titasukutisun.epizy.com/22339379554.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/busqueda_de_informacion_en_la_red_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/70831763561.pdfIn PDF document text
    • http://gunololidomip.rf.gd/cryptic_story_the_star_spangled_banner_answers.pdfIn PDF document text
    • http://netozovozuze.rf.gd/94224430201.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/gedegowelavafafemilugeg.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_off0000f65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 5208 bytes
SHA-256: 1b74d24dba7c3649821f77da9420a846bacabe60acf3e5077375059e70d4b3f7
font_01_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 10512 bytes
SHA-256: 95982909cbf5851a24179fc0c3af432da3828805e9777c112498ade16488aca9

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