Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b6b30cbd03bfba…

MALICIOUS

PDF

68.4 KB Created: 2021-03-22 21:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 07d1bf45c8a9cd297207db656111a983 SHA-1: 1b697fcd485610b81d7a9b8cf508c38ab86c4f20 SHA-256: c8b6b30cbd03bfba441761f29005e075f7bc15119243821ef3265bda2d40101b
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 0.9996

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://dafemum.ru/123?utm_term=caldera+spa+instruction+manual PDF link annotation
    • http://kinokaiff.space/43680151149fbjg0.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/f2gcj4X/teporuguvinat.pdfIn PDF document text
    • http://usblighter24.site/badagugapofeziriztoyjs.pdfIn PDF document text
    • https://cdn.sqhk.co/dabekojov/5ig3hhn/nebipibakobosepujorinun.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/Viicgc3/heart_problems_in_dogs_grain_free_food.pdfIn PDF document text
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/tifez.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/gjh9Phe/my_little_baby_4d_reviews.pdfIn PDF document text
    • https://diwamelebo.weebly.com/uploads/1/3/4/1/134108813/wivozomibibagi-totanane-xemiribuboromed-vuviduwabuveti.pdfIn PDF document text
    • https://cdn.sqhk.co/pugusomimoro/euibhgJ/fasadelotazaxo.pdfIn PDF document text
    • http://storeeu.info/uniformes_anglo_mexicano_tampicotjz88.pdfIn PDF document text
    • http://ig-socialmedia.xyz/jadugiloludupimidd8z1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_1987efea65e148d99635dd934570d282.pdf?index=trueIn PDF document text
    • http://pivomowofafo.rf.gd/how_much_oil_does_a_predator_8750_generator_hold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be97ac21-b76d-4361-8191-9253ee072ca7/polycom_soundstation_2w_non-expandable.pdfIn PDF document text
    • https://ee6e56e8-c390-49d2-810b-d4defef8b9c1.filesusr.com/ugd/eda187_2e8ca927d00f4fc2a679e2a364778b91.pdf?index=trueIn PDF document text
    • http://wizerojagapez.rf.gd/who_is_considered_immediate_family_for_bereavement_leave_walmart.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_7f33e4734f614b798a82eb042ca46601.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c478a38c-9bb5-413b-928f-a5cf7ceb0ae4/ray_bradbury_theater_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c73572-20af-472b-94a0-c8eea88b943e/how_to_find_paramagnetic_and_diamagnetic_in_coordination_compounds.pdfIn PDF document text
    • http://zanevijid.epizy.com/kirchhoff_s_voltage_law_lab_report_discussion.pdfIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_d64dfc77c24749f5bb5df8ad524870c0.pdf?index=trueIn 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_off0000cc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC66 5124 bytes
SHA-256: cdb45899697dcd42dc67d48d596189eb555c91cf34bde6eacf1f728659650152
font_01_sfnt_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 10664 bytes
SHA-256: 4280be19aca0f3bee6f1ea1cec2cf30fa98a523336fb9949fbe32f043b274be8

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