Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddca639f9190095…

MALICIOUS

PDF

77.1 KB Created: 2021-05-17 07:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d325c90ddf9637da51edbf901872b4b SHA-1: d94f23dba7d2b3a2c4950fda3d10c23e07f52e26 SHA-256: 3ddca639f919009563b5f70ddf1e852301b1ce376c68b4a8d72ec5fa396558a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=dorothy+must+die+book+series PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5ff285ffe8b4a.pdfIn PDF document text
    • https://pejusokipa.weebly.com/uploads/1/3/4/9/134902294/wunawevabudup-zometiwagema-wapix.pdfIn PDF document text
    • http://rewokujow.scienceontheweb.net/best_ipad_annotation_app.pdfIn PDF document text
    • https://gefatute.weebly.com/uploads/1/3/5/3/135345711/waxen-xexud-foromugobalafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_60291a8427b8f.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/esl_appearance_worksheet.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/warhammer_40k_necron_codex_8th_edition.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/nifezetirubafifif.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/wolutalorasupabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60218705564ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_6064e6bb5f223.pdfIn PDF document text
    • https://bewabolome.weebly.com/uploads/1/3/5/3/135347927/9050714.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/zimotovujeradiz.pdfIn PDF document text
    • https://pumebogevi.weebly.com/uploads/1/3/4/5/134583518/pobuguziwoganog.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/tc_nova_delay_factory_reset.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/mixanaz/blueprint_ar_15_lower_receiver_dimensions.pdfIn PDF document text
    • http://suzifoki.myartsonline.com/hole_s_essentials_of_human_anatomy_and_physiology_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6c1d0d-d6c3-425a-9964-ab4a59128067/nasakoxopafuweganeke.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/amana_washer_wont_drain_or_spin.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/58272383606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f012e9-107b-42cd-b6a9-2a3f14b061e8/47779896943.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/zixomuzavetulidip.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/livevutomizejat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfec79b-9d50-4e51-a8e0-5e47698b2724/99237498672.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_off0000f049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 5128 bytes
SHA-256: 332022676cd8c0d4f01f4d4e07895b9ad4934886e16c8b381f3e3d68433d25c6
font_01_sfnt_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 10880 bytes
SHA-256: 69cfc6202db21c49ee9ea560e5317ea91191fc7f2c99b8f43017cdb9dc35cdd0

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