Malicious PDF — malware analysis report

Static analysis result for SHA-256 548692dd4a722801…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 05:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 998e7d4fbbe32a77143187068d3bc416 SHA-1: e70fb8dbb45f44520feefd557502def2e66fa454 SHA-256: 548692dd4a722801c7c96b1ccd33253439ae5090793bb1fe91f9fb18ab5dd3df
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://resalured.ru/strik?utm_term=how+to+get+cognitive+behaviour+therapy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495043/normal_603c65baa6e8a.pdfIn PDF document text
    • http://gefejisu.22web.org/betternet_premium_apkmb.pdfIn PDF document text
    • http://znasila.ru/nuzupixozovumuduwiv1bina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_6038ba5185259.pdfIn PDF document text
    • http://chambrehq.xyz/2007_f_150_lariat_owners_manualmt27d.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/fairy_tales_stories_in_telugu_with_moralzbdh2.pdfIn PDF document text
    • http://itclick.pro/26215592601limp9.pdfIn PDF document text
    • http://verifiedbadges-form.com/castillos_de_hielo_partiturae4z26.pdfIn PDF document text
    • http://bitcoins-profits.com/bachelor_of_business_information_technology_kca_universityyx50a.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/60368069786q21gy.pdfIn PDF document text
    • http://xekuluw.iblogger.org/bses_yamuna_power_new_connection_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5fca6a7dd6d31.pdfIn PDF document text
    • http://mjawebdesign.net/dubifebigej9q.pdfIn PDF document text
    • http://bigmagazin.xyz/dewawugelz1w4a.pdfIn PDF document text
    • http://domsale.xyz/ces_2020_exhibitor_list_xlsdy50s.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/d53d3d94-1c4f-43b5-bb2c-bb114c81a377/what_do_the_numbers_on_steel_wool_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91ce8ca-3d54-4de7-a6b7-d95cb193fb9d/93574157117.pdfIn PDF document text
    • http://kosiwamirofakad.rf.gd/sig_p938_aftermarket_parts.pdfIn PDF document text
    • http://gevewodex.epizy.com/tajuduvuzazogelopivedor.pdfIn PDF document text
    • http://latopoladizewel.rf.gd/geronimo_stilton_author.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_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 5220 bytes
SHA-256: 78e67c15bbbb0fee105dd2fe98cc4f0e391ac9918914f1db8b3c8fee339634f0
font_01_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 10568 bytes
SHA-256: 6560180205e1e0d21f23707d45f2b1aba4b06d9c1649d97bd82579cbe1f4c10e
font_02_sfnt_off00012d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D45 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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