Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ffdd7820da02da…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 02:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82aeae4eace11f691c7b5784862d568b SHA-1: 1697b1c4141f29eb6a5e547cb024307438966c30 SHA-256: 95ffdd7820da02da3e3289b899eed4ed66a75251b817d1d341554d4469c7b774
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains multiple embedded URLs, with at least one pointing to a suspicious domain (nipisod.ru), suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URIs is a key indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/123?utm_term=new+whatsapp+status+2019++mirchistatus
    • http://mofizikozi.22web.org/32825247228.pdf
    • http://wazumitizun.22web.org/mejalinivabibona.pdf
    • http://znakomstva18x.site/what_level_is_xcel_in_gymnastics86urt.pdf
    • http://gnoogle.site/89270686465uq655.pdf
    • http://flathead.us/what_is_sensory_neuron_simple_definitionmsc7b.pdf
    • https://static.s123-cdn-static.com/uploads/4381104/normal_60006d453ea5b.pdf
    • https://cdn-cms.f-static.net/uploads/4451205/normal_603e467659035.pdf
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5fe8ff0667c5c.pdf
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fc620609e277.pdf
    • http://bigowet.xyz/what_size_bolts_to_mount_panasonic_tvdvi7n.pdf
    • https://cdn-cms.f-static.net/uploads/4379487/normal_60289e4959a48.pdf
    • http://getfreecreditreport.info/six_of_crows_casting_callvahqp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_225f1d66056d4e12ac9d6d222f5766c0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff067c1c-5ea8-43d0-8e2f-d5ac182e0a0d/cooking_for_geeks_download.pdf
    • http://pirubezufo.rf.gd/kenupozifafegiwepepa.pdf
    • https://uploads.strikinglycdn.com/files/b89b8288-6a4d-45a1-b96e-bd5f37c3b278/what_are_the_specific_advantages_of_database_management_system_over_traditional_file_processing.pdf
    • http://xevorerokune.epizy.com/juvumazavajajasas.pdf
    • https://uploads.strikinglycdn.com/files/60991220-e32b-4596-95a9-1d82e6f74a72/94106286303.pdf
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_7bdeb03b269b4aacaed17c826cb65419.pdf?index=true
    • http://rajixubododafu.epizy.com/anti_apartheid_movement_essay.pdf
    • https://uploads.strikinglycdn.com/files/d868f558-c9d7-4d18-a424-73e93f0bc487/2015_kenworth_t370_owners_manual.pdf
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_8d287bbfe67f43cbbf65a9405c94d9bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2fdb795f-3254-4460-973a-4c56cf9194d7/52665633624.pdf
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_1859106a2b2a48cd9fda9287577fd47b.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3b.bin
deb15d7cc1f8660aaecf610445f947af92abcff4744f75610790c97017c8670d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 5348 bytes
font_01_sfnt_off0000fd82.bin
73647947ed812fe335296d06b46e5df57e2aecd7db4b1f3762083811aefb23ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 10740 bytes
font_02_sfnt_off000121ec.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 4324 bytes

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