Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c8b7019cde44c6…

MALICIOUS

PDF

174.9 KB Created: 2021-04-03 09:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5352ce77af6b892bdd83951d0c63b499 SHA-1: 954e9f34f3661c35d6100d8a69099e80a08fc01c SHA-256: b1c8b7019cde44c61810f71f10f12c75921a9ae82707d4ebbb830ca873bab1c2
136 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a malicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to prizes or lotteries, aligning with advance-fee scam tactics. The presence of an external URI points to the likely intent of directing the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9717

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/strik?utm_term=what+is+franz+kafka+best+known+for
    • https://cdn-cms.f-static.net/uploads/4450047/normal_604cd84835966.pdf
    • https://cdn-cms.f-static.net/uploads/4467560/normal_605d6df13105c.pdf
    • https://cdn-cms.f-static.net/uploads/4401972/normal_6030d363afcc2.pdf
    • https://static.s123-cdn-static.com/uploads/4496818/normal_600059b9e6829.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a0133088-7ef2-453a-887f-6c8a65630572/46147279594.pdf
    • http://gavoditi.epizy.com/44717928933.pdf
    • https://uploads.strikinglycdn.com/files/79a3dacb-3926-46b0-9e65-6581f82ef159/tissot_1853_chronograph_battery_replacement.pdf
    • https://uploads.strikinglycdn.com/files/0c1c1012-e032-4246-a524-3570c8f54951/soxodojuzegogaraxuwaxab.pdf
    • https://uploads.strikinglycdn.com/files/70fb743a-5688-44ac-b22f-fd29e165c9fc/60806074808.pdf
    • http://fijosat.epizy.com/53184899401.pdf
    • https://uploads.strikinglycdn.com/files/ca0b703d-26e8-4075-9bdf-f72fc7e5485c/22291926675.pdf
    • http://tubulufegufixo.rf.gd/business_card_ai_template_with_bleed.pdf
    • https://uploads.strikinglycdn.com/files/7be91b8c-42e0-4d26-ada5-2e89d9130f61/lemutojiruritadip.pdf
    • https://uploads.strikinglycdn.com/files/046085a3-fe6e-4ec6-a0b2-162daa2dcd77/57064426717.pdf
    • https://uploads.strikinglycdn.com/files/04fe982c-b84b-43fc-b364-6122d3f4147e/jegegozowifuwem.pdf
    • https://uploads.strikinglycdn.com/files/793152e8-ffe0-446c-99dc-74d40bd55fdd/harry_potter_books_1-7_hardback.pdf
    • https://uploads.strikinglycdn.com/files/7ca51060-841b-4336-92f8-7fa403cdf9d8/japowepifaval.pdf
    • https://uploads.strikinglycdn.com/files/07f2b2df-0323-47a7-bd93-3d1153635311/petty_cash_confirmation_format.pdf
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_a831ac04cfb9475580a0e1f5ff78c6eb.pdf?index=true
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_1badd90988634575b0d7891b80a1a523.pdf?index=true
    • http://lebikur.rf.gd/bepafedavakanulawo.pdf
    • https://uploads.strikinglycdn.com/files/8fc907e9-807c-44fb-bee6-60e263f48148/22463709058.pdf
    • https://uploads.strikinglycdn.com/files/29fba05e-9126-438a-bf37-84f4fd08f844/nespresso_lattissima_one_coffee_maker_and_espresso_machine_by_delonghi.pdf
    • https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_5f342906ce1a4afbb48c436bbe81172f.pdf?index=true
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_12796aef86374c15883132c26fb3fa34.pdf?index=true
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_eace542adea44e089e7d16af01ea7543.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024945.bin
aa1508cd214e66ad312785de9d2fc7d135502550bf76a0c12ea09982b3a5d659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24945 4968 bytes
font_01_sfnt_off00025a3a.bin
61c8b0611ac20b54ab84c148e4a55e41cac0a191aa001fe403de57caed4b076a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25A3A 16076 bytes
font_02_sfnt_off00028984.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28984 16060 bytes
font_03_sfnt_off00029e1c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29E1C 4324 bytes

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