Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3320aa397deeb36…

MALICIOUS

PDF

74.5 KB Created: 2021-04-07 22:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2df00a29d98e0f020e8569b4d6dfe16d SHA-1: b977dd9860e6b2314a414f452e77584843e003e2 SHA-256: c3320aa397deeb36047447d5f3c8a1e6d9a61394131c448bd3ce66d724cc208c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, soxebez.ru, which is likely used to host a phishing page or download a second-stage payload. The document body, though heavily obfuscated, contains text related to 'Jenn air range top gas', suggesting a lure for a product-related scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=jenn+air+range+top+gas PDF link annotation
    • http://jugapus.sportsontheweb.net/58819817400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_6022e7a618aa4.pdfIn PDF document text
    • http://viziziziv.mywebcommunity.org/sound_absorption_materials.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_5fd6696b949c9.pdfIn PDF document text
    • http://masajsalonunuz.com/hypophosphatemia_managementxdk7h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498348/normal_6003d3c97caff.pdfIn PDF document text
    • http://naturalm.space/how_to_find_outermost_electronsa7sbi.pdfIn PDF document text
    • http://iqecoportal.ru/insinkerator_badger_installation_guidexvcj0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_6035037abe7a3.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/ad429aeb-ccf8-4e54-9220-f6577e1311e6/65681937012.pdfIn PDF document text
    • https://ad217471-f301-4d07-b05b-71cdb813ff8b.filesusr.com/ugd/4f915f_484e19b7bdc3476ca6a20fdd4c44d345.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/wuzewokoji.pdfIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_23957a5cf5c446209e567a6c3971e91e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/how_much_does_it_cost_to_service_an_industrial_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae30cbef-864d-4590-afcf-d59fcab4f0d6/can_you_track_usps_first_class_mail_international.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_b1e382cd3a944c64ab6cffe61609168d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/what_is_chloroform_smell_like.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/kurzweil_pc88_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655fa3d5-1350-4195-b84c-5202bb7d6874/what_are_the_disorders_of_the_pituitary_gland.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/76727513235.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_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 4944 bytes
SHA-256: e37cd7bb3523ae086432b39868e447a843fff5c4e46b41c6efd415e66b8d5539
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 10908 bytes
SHA-256: e78fed412ad7513a5631006dd4da38840442c06ca4db5cd2c319c9b55eac53dc

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