Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e77eafd1fbce87…

MALICIOUS

PDF

83.6 KB Created: 2021-03-18 06:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 28eb1cdc464e0e52d609279ea48e59a4 SHA-1: 9c66329ec00d16b88a8e000bc13717db79ab6cb2 SHA-256: 17e77eafd1fbce87000aaa134eec00c1608b2d5786281de845265da78999d403
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. The document body and embedded URLs suggest a lure to download software, potentially malicious, by presenting itself as a link farm. The presence of external URIs and a link farm structure indicates an attempt to redirect users to potentially harmful content.

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://botokaw.ru/wix?keyword=download+kingo+root+apk+android+4.4.2 PDF link annotation
    • http://kakorixow.mygamesonline.org/83812765347.pdfIn PDF document text
    • http://runmasten.online/ancient_japanese_sword_fighting_styles559jl.pdfIn PDF document text
    • https://lakafoxure.weebly.com/uploads/1/3/4/2/134266374/rumipalexam.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/vixanurumegowese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415080/normal_5feec60ebb410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_602651e8e64cd.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/bomekigolo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe105e1495e.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/famous_lines_from_a_river_runs_through_it.pdfIn PDF document text
    • http://kyhni.site/cansat_2018_mission_guidey26x1.pdfIn PDF document text
    • http://balifruit.com/442595599168z33o.pdfIn PDF document text
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/a9389d14eae01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_6001cadb5008a.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/ruporigazojus.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/6767558.pdfIn PDF document text
    • http://poruzotosiku.getenjoyment.net/dekibarug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_600e223a29609.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_8ad239332ea046b78dbdcf7f1757da17.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_565d5c6ba60646668f8d04689157ccb9.pdf?index=trueIn PDF document text
    • http://bujekotu.atwebpages.com/noun_clause_worksheet_with_answers.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_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 5356 bytes
SHA-256: 0521c7c0fda2533d3a7beec14792e247355d64cba8e7dc505665d94b58c9262b
font_01_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 10548 bytes
SHA-256: a4c3e15286b78633331c632197238519c2a00cf85c9d3b1fe47c21a3aa9084e4

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