Malicious PDF — malware analysis report

Static analysis result for SHA-256 febcbc216b83a5a6…

MALICIOUS

PDF

81.3 KB Created: 2021-05-27 12:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3b600567f12ac531657ddba85a8fbfd5 SHA-1: 29a5f246a1045c3801ca0f84344916c900bbeb5d SHA-256: febcbc216b83a5a6e7051fa63f828d5a5dc2aaaf724d697e29b4b1345d608571
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jumiwimov.ru' suggests a phishing or malware delivery attempt. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext, indicating the document likely contains language designed to create a false sense of urgency.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=bordereau+de+paiement+cnss+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487382/normal_605bade972823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_603bedeff31b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_6012edc95f6e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_60512d4bac157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_6025a8cd3a9fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_60007b40d2b5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff7c73d54e6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fe2da3a0fff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_605968f54df7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_60127983d78c5.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://uploads.strikinglycdn.com/files/c29256dd-9c86-413f-a821-8ad59375ea88/yard_machine_lawn_mower_ratings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d28bee2-ede3-4fad-a02d-f55b89a365bf/talizaforinuwemalotomog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f06bc6f-d203-4c5f-8255-d49cfcad5144/criminal_law_book_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355dff6c-a663-45a5-b4e9-c40b21ecde7c/60208872890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4322f66-0208-4016-a8ff-06a7bfde824c/rujibumebef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed02c6d7-59cb-4503-a782-b47c96d3f590/dream_meaning_dog_bite_on_buttocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d63bc6-7beb-41ef-b96a-9747c3937750/the_economist_18_april_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286c1401-0869-4e6b-b46f-828e230b8eba/dimefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961e00bf-46f5-415b-a824-24b0c1a78479/how_to_find_the_missing_side_of_a_triangle_with_trig_ratios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039c1980-41f0-47b2-ab11-aba57e5729ca/89676773855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d548c8d-2fae-4e65-9f7b-77adef356347/kurofori.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_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 5200 bytes
SHA-256: 2e7dc81d06c96fee7658892d66b858acc6bcc5bd2f5e9c8ea4f756a98d77adf3
font_01_sfnt_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 12092 bytes
SHA-256: 2d14a4ec689c9d2af5451b2f2092e7d0bd7adef66ebf900789c4cb3b74a25c59
font_02_sfnt_off00012856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12856 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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