Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af9a59ed92ea81b…

MALICIOUS

PDF

84.4 KB Created: 2021-03-29 22:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 28cbb45a2156d82d2a3ca3c0a5894c16 SHA-1: 2e0e58edf409bb3b2948cf310b269b2641cf8ccb SHA-256: 6af9a59ed92ea81b26ac0ba8aa02cc6e8cfd0c7899e4cb12d648e5a265c7fffb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=elective+affinities+summary PDF link annotation
    • https://cdn.sqhk.co/fesakesovoka/lrbhijh/first_strike_final_hour_ios_gratis.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/simplesmente_acontece_utorrentvfhy1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_604da8414c7d9.pdfIn PDF document text
    • https://cdn.sqhk.co/kibuluke/1BjjidX/fuzer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fedc01238f3f.pdfIn PDF document text
    • http://ximilakuxulo.iblogger.org/zeroxotilumoviw.pdfIn PDF document text
    • http://zodimevumu.22web.org/54365482570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_60150e6845155.pdfIn PDF document text
    • http://dontbeshy.xyz/2013_dodge_charger_headlight_bulb_sizeu8qfa.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/the_hows_of_us_summary_endingd77h3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdc702e3413e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_6052e3e7795de.pdfIn PDF document text
    • http://verifybadgesbusiness.com/warhammer_40k_9th_edition_core_rulebook_vktq83s.pdfIn PDF document text
    • https://cdn.sqhk.co/dotifonuvuwi/fR3hahf/10207186056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7bb18479-a70d-474c-8504-061d0804bf87/honda_ruckus_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe75635-b6c8-4378-bb28-835431fa0f76/how_to_thread_singer_curvy_machine.pdfIn PDF document text
    • http://rabopusafat.epizy.com/festo_pneumatic_cylinder_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188c7d85-9a26-43bc-a324-5e08160f665b/saffire_pro_40_mix_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b961bf-7712-4114-93a8-862d53fe3652/94967227119.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 4916 bytes
SHA-256: aed47c7ca88e76e1956036cc0d6838e5a415ac65ab49549251f6bd515872480a
font_01_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 11864 bytes
SHA-256: 2fc125bb9dd9b0803f1a5089b5b23638bf3074a1a3afebc8ef3405b9f95d4adc
font_02_sfnt_off0001368a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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