Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ac213d3f42db15…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 11:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b012eaac04dcd893f49bdee6537ba5d SHA-1: 86058f5ed2a05fb795f2b3620add1b6cd6e73dec SHA-256: f0ac213d3f42db158c4c902f649b5aedb6358531eb29359a4e3e1f6e7c75841f
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://crophysi.ru/123?utm_term=windows+movie+maker+2012+setup+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fc56d26c872b.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/vhaggV2/chicken_gumbo_sloppy_joes.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/iajgPgf/grodan_grow_cubes_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_6050fde220af5.pdfIn PDF document text
    • http://tosufiloxosi.66ghz.com/reguzimafebozivamudor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_6059caf1e4ba8.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/7hbfjjb/wagodabifubunewonakasoji.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/Rwyibgd/amazon_selling_fees_too_high.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/ifNjjii/sosigawopavaxekid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383132/normal_60045f6e22c50.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/u2sjchf/ski_safari_2_game_free_download_for_android.pdfIn PDF document text
    • http://weporobedamebu.22web.org/43325543937.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamiwumewamem.epizy.com/cisco_catalyst_9300_quick_start_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2283dcb6-f172-40d0-a02e-2d2ef521ec4a/does_samsung_replace_screens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ecd0da-2834-41eb-a569-65743e868a9c/pijifivogufenupazovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcc198c-f305-41e0-b644-c7796c13adbd/xamozirakenamebetixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28d75d6-03f1-4507-bb5e-60ebdf98dba2/how_much_is_yamaha_motif_xf8.pdfIn PDF document text
    • http://xifabopopotesa.epizy.com/jotasitikitupizu.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/25748689270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9118abe-4822-425d-9fef-cfb909868d49/windows_10_video_editing_software_free_download.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/mulejuwaw.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_off0000ff80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF80 5708 bytes
SHA-256: 22471c142a1bb81597bc1b389901cde27e7310bd88102b04614cd33253a3968b
font_01_sfnt_off000112fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FE 10716 bytes
SHA-256: 97f07fdce54a521f4703722947f5956c354bd3e5a8a8f74b8c72e3504670e1fa

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