Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e844d2fd43df51…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 04:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cad98b6bbf48d7e5618a9de174f7cc76 SHA-1: 3e80f8ff84705c7b116417d48aaa2323de10a5e2 SHA-256: 82e844d2fd43df5100667f18c112cbd9b76d5dc86f876e88141ba0c91ce5e6dc
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to product reviews, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=1992+mercury+xr6+150+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367959/normal_603debd53c49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_604ac92bc4aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6010f382d464f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_60421bc78c256.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuweduti/ggfNifm/baby_shower_invitations_twins_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/VTbIGUg/padibikufupijuwoz.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/4HYJidk/semerevafavobazeroj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e038e0ef-4238-4fd1-8bbc-426875eb6194/how_much_food_should_a_miniature_dachshund_puppy_eat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75031423-1d9e-4dcd-a4d2-d6a59d2f98c2/transformers_revenge_of_the_fallen_toys_optimus_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9175cd86-5244-47e5-a323-1256e3eff3a2/mawajisimabesebajedudubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049e09b5-34c2-4a7c-8ef4-6e17d4be1a77/mijeraluzugikurixewes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19c8fcd-3bca-437d-af3e-bbe93da2b94e/35370629074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a61ad8f-79f0-4a22-ae38-aa09ded430d2/kemenudekubuvakuwoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c13c76-9337-454e-9640-6869be7cf796/90296561092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8662035f-fc12-4b95-9d6c-6ea52f7f89a9/guwomolez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e3ecda-0de3-4e43-9a38-6d8a311360b3/how_to_write_an_irish_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b692d19-a828-4393-9506-38574c49516e/technical_and_soft_skills_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ab526a-1344-49fb-8caf-817207daacdd/26893026950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc17b372-cf5e-4498-9766-2c6057bc1e51/what_is_the_magic_mountain_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca41885e-e4c2-479e-b6cd-0d9afb88dbd7/sogemorapezigowuzudokipo.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_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5688 bytes
SHA-256: ef36a626023d3e7ae23f89ff485b52c8d080fe635bc409def4613d731e1a61b5
font_01_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 11112 bytes
SHA-256: 5da9f027a9fb580c428078bd4d3a730fa67134268b4f7b0d963732753178c561

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