Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a80c5e582e707e0…

MALICIOUS

PDF

98.0 KB Created: 2021-04-19 02:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c6959604e3539614b8f7ea13b6e821c SHA-1: 9f0be4f1b0f1ec61ab307ebf8eb72404968d329e SHA-256: 4a80c5e582e707e070cf64d9d64ed0cc2e4e7779a65b28d9c6cad92cd10ca608
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 0.9994

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://fokemale.ru/strik?utm_term=barska+safe+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407997/normal_6037a0ae10d64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5fffc8c956425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_6063dbf3baa1c.pdfIn PDF document text
    • http://ruwegekugite.22web.org/35360265130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453335/normal_5fc74ccc279f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450426/normal_5fd14e1950bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_60315327a5ed1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410953/normal_6001515a48c14.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/pipexulenuzuvatila.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://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_a451cb60205348a5b255d01ee14dac01.pdf?index=trueIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_472abad0e22b433389c74bab83f50d11.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_81aa12c369e94b4faa184ca89a9dc476.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1899d865-c28e-4f2a-9d42-d0173c22f1d3/xetukavumedajifaza.pdfIn PDF document text
    • http://davejizejago.rf.gd/18463297914.pdfIn PDF document text
    • https://bfb79b04-db4d-4c54-a74a-4733ff68ceb9.filesusr.com/ugd/11291b_76009de504a64dab8225c42941175515.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b61754d-e791-4e6a-9db9-d11ff7b02a69/10908975373.pdfIn PDF document text
    • http://rovefokizam.epizy.com/how_to_connect_magic_mouse_2_to_ipad_pro_2020.pdfIn PDF document text
    • http://kutubuge.rf.gd/automotive_service_advisor_training_manual.pdfIn PDF document text
    • http://batapijas.myartsonline.com/6376077685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939729d0-b2f7-4336-89d0-c58bcb7af1cc/86306960510.pdfIn PDF document text
    • http://dewudirana.epizy.com/parisian_clothing_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2271a21-3547-4abb-af41-0c8fa8f300bb/sans_top_20_critical_controls_spreadsheet.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_off000135b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 4488 bytes
SHA-256: ad5d4f674420939df150579643337bccfb5813203c8af7ff338d6544ebce4939
font_01_sfnt_off0001450f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450F 11680 bytes
SHA-256: 44e99c8f65d2aa491e8cb60fa12dcd49e118ba91b21a1c433d5599f83545dd1b
font_02_sfnt_off00016cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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