Malicious PDF — malware analysis report

Static analysis result for SHA-256 c743f5340eb58227…

MALICIOUS

PDF

77.4 KB Created: 2021-03-06 11:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3fc7cb90aae417af29b4db0a2ee5413e SHA-1: 84f2ba8faa86add05324286a17b188fb42091423 SHA-256: c743f5340eb5822763346795d8a360d1a2a9e3cc656a54b998965c352a4c958f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, suggesting an attempt to distribute malware or conduct phishing. While no scripts were explicitly extracted, the nature of the embedded links and the ML detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://nipisod.ru/strik?utm_term=the+secret+dare+to+dream+trailer+music PDF link annotation
    • http://degimogug.mypressonline.com/35526120527.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/hJjs4xs/25448170627.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/tafesutikesalomutagorodab.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/webovifosovotegukobuzalot.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/washington_gas_bill_payment_address.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/77386915743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_601cb2ed39736.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/wu_tang_saga_show_cast.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/tomoz.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/malazan_book_of_the_fallen.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/wopixanexa.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/60312419906.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449421/normal_5ff3cb072fc4b.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/thaiama/kasewoveka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_601d12f0d4038.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/how_to_start_toro_power_clear_621_qze.pdfIn PDF document text
    • https://cdn.sqhk.co/nekuripafi/fTSja0m/serusugajetavukorifeso.pdfIn PDF document text
    • http://nebewilot.iblogger.org/galiwizidisaruxinutuxutaw.pdfIn PDF document text
    • http://mawidoxejonej.iblogger.org/in_app_billing_sample_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/YYKkDhh/lutajuluzigasutokobitak.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/qBhgKjd/why_be_president_of_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488322/normal_5ff40c3966f9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dosekidonara.epizy.com/vosofokogomukilolalu.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/the_role_of_internal_auditing_on_management_control_success.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/24092875360.pdfIn PDF document text
    • http://nujugeteteda.myartsonline.com/mass_effect_2_crack_freedoms_progress.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_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 5128 bytes
SHA-256: 61b2aba519b67a4b0f09055c3586ce0206eb3a105220418579cd49c2a6be1033
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 11132 bytes
SHA-256: c3f7ca26382ddcadaeb8de9038b74aa425e92a267f473ce39e38044faec361c2

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