Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded32b22fbc52c20…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 10:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc0ddb3022cb22bede85b23f1ce16a92 SHA-1: dc9789fa4f9bcfd77ce8c02469d1da2c3aba1e53 SHA-256: ded32b22fbc52c203126a8676a1bb24f67e3074c46fb7bfa35b24c3ea39491ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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/123?utm_term=bachelor+australia+2019+tv+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375209/normal_6015548693fd8.pdfIn PDF document text
    • http://shop-onlain.fun/alcatel_lucent_8018_ip_configurationtasig.pdfIn PDF document text
    • http://vknart.xyz/lusizejapafii0fbq.pdfIn PDF document text
    • http://putinoid.ru/emoji_maker_create_stickers_and_emojise4dd4.pdfIn PDF document text
    • http://giocodigital.space/36957916017usllj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459922/normal_6041dde08933f.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/enWOAXU/fruit_cut_slice_master_mod_apk.pdfIn PDF document text
    • http://vvinorama.website/34213559626x4uf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_5fca0a55be408.pdfIn PDF document text
    • https://cdn.sqhk.co/japivuwali/giihiaF/best_flight_simulator_for_pc_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/iBBjaYl/30987543350.pdfIn PDF document text
    • http://yewes.space/79354597905mf8gd.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/fDjgiLs/zibadumejipugetu.pdfIn PDF document text
    • http://musofiron.ru/86083739449j7q0t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_6015a286afdc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/497de8e5-1bfd-42ce-957a-b746fc9590e0/how_to_be_a_good_christian_wife_to_your_husband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec2edf2-db42-485f-b892-db9468a5541e/tajuweweredezewude.pdfIn PDF document text
    • http://rudolonofuxa.epizy.com/45834882634.pdfIn PDF document text
    • http://luzigipo.epizy.com/darawegituwosifejuzamir.pdfIn PDF document text
    • http://mevomum.epizy.com/certificado_medico_prenupcial.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/66810659111.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_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 5792 bytes
SHA-256: c9dec24a6ad6061415129d59b0709e3717935b78dfd79d1107cf9a9b136994ec
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 9700 bytes
SHA-256: d452adb0cebf4ca8c6f273106afacd6b52c317a914c442daa40a56f7e0c52a82

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