Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65db23a89e54ca4…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 01:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d404fc6c9864e96e71664b7c85a00324 SHA-1: 3629240e77ca6e2df3f6b3c03a0e8c69fcc13c86 SHA-256: b65db23a89e54ca472aa60f036da459855506e6c3eee71ae2a5c65c71a1027a5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=final+fantasy+6+guide PDF link annotation
    • https://jikujumek.weebly.com/uploads/1/3/5/3/135318263/galegolamenabapigomu.pdfIn PDF document text
    • http://shopsupergood.site/mamma_mia_here_we_go_again_piano_sheet_music_free37x91.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/ribuwopuvulup_jojan_reradiganomidu.pdfIn PDF document text
    • http://vipmanmarket.space/lynx_touch_series_installation_and_setup_guideh6h1w.pdfIn PDF document text
    • https://lolimoxozidexus.weebly.com/uploads/1/3/2/6/132682882/1050459.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/6297033.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/kujor-tinikode.pdfIn PDF document text
    • http://totalcreditreport.info/vapotuxutima6ivm7.pdfIn PDF document text
    • http://kagotigidiwijar.iblogger.org/sifotoniwezibowopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifimedirawi.epizy.com/85237649635.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_a359a094480d440c9a16fd714c7cff50.pdf?index=trueIn PDF document text
    • http://vugapadilubokis.epizy.com/arduino_atmega32u4_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e551cea1-7fdf-432f-bfad-14f82846d406/zofinimumemuforalodumixeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/solo_antivirus_scanner_free.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_3c8b31f5dcd34ca48022b739390e7205.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60837ed2-e456-4149-b551-cbb0c900c2f8/gojenezofinozuvarufejake.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/jeep_grand_cherokee_srt8_performance_parts.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_a28cf5b23c054188ab5d0e366aab46b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/los_juegos_del_hambre_en_llamas_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108ee982-7597-4cdf-802f-1551af817445/samsung_galaxy_note_3_price_in_pakistan_whatmobile.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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 5192 bytes
SHA-256: 71a1974f3425314a7396495021e937a00b59897f151f9a287224c7b69aed2694
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 10592 bytes
SHA-256: d6e4ab84abfd768a66ea2674fff77927e1b87ca3ac442b523a9add7b8679a89e

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