Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51fddb726577581…

MALICIOUS

PDF

69.7 KB Created: 2021-03-08 02:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a750d7f7a7d02768c98f235bfc4e2fad SHA-1: a38be4418f61035f1dd952860993ea03d0f0766d SHA-256: a51fddb7265775811ad3ad5a607bb3356aa001b7b9ebb6a193d6fef6207162c3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains an embedded URL pointing to 'gimoguvi.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains text related to 'ice breakers holiday mints' and the authoring application, suggesting a lure to trick users into interacting with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/strik?utm_term=ice+breakers+holiday+mints PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5fce86eb565b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_60295a99f13f4.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/welefabuki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462986/normal_5fdf533cae45f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fce33cdc82ae.pdfIn PDF document text
    • https://fakerotukipi.weebly.com/uploads/1/3/4/3/134376647/mujidakevowipajep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_602b8083d1869.pdfIn PDF document text
    • https://mitosimizede.weebly.com/uploads/1/3/4/3/134372473/b3343dbccc.pdfIn PDF document text
    • http://nikecortez.net/kelvin_celsius_fahrenheit_conversion_worksheet61llc.pdfIn PDF document text
    • https://kurinasuvofete.weebly.com/uploads/1/3/5/3/135334761/pekitegafudiben.pdfIn PDF document text
    • https://gakokoxexoboj.weebly.com/uploads/1/3/0/7/130776672/39f1a3a1a74a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_600f233684ced.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374521/normal_5ffa65222e8cf.pdfIn PDF document text
    • http://modernstyle.pro/alice_walker_everyday_use_character_analysisba902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/slope_intercept_form_of_linear_equations_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/gattu_battu_song_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7841d46-d660-4f3d-b97f-8b45ef07c2eb/how_to_activate_ebt_card_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c08a766-7924-46ea-8111-45a4681d8118/where_to_see_cactus_in_sedona.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/27397115219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d0718c-7dd4-4287-ac01-3a2dc837a19e/96137766454.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/service_discontinuation_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a91d7b-ce78-41b9-8cc3-eb190a31394a/fundamentals_of_differential_equations_9th_edition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102c03d0-6d8c-4345-b8a3-1d6a24b88a1e/kozibedafawe.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/antigua_guatemala_travel_guide.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_off0000d1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 5420 bytes
SHA-256: b0f6a0a225583e3df6bc2f74f12b09bd00e4c5438fbed453ada575e3bd7da61d
font_01_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 10988 bytes
SHA-256: 066118e38536ee7ad75fe35296e01dc94b0b6e82180dc4a2e2a4d9fb73844462

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