Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c92feb9f410f1ee…

MALICIOUS

PDF

75.8 KB Created: 2021-06-03 06:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b24c1aaf3d0ef9dd6b0485c76a3ad1 SHA-1: 5336fc53886ff0a9ac8376fccd5102506c17ebe1 SHA-256: 1c92feb9f410f1eebae04f23ab3247953b07aa5a3e43e75f19f177781d2d3a66
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and embedded URLs related to software downloads suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references that align with software download lures.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=camscanner+pro+apkmb
    • https://static.s123-cdn-static.com/uploads/4467950/normal_5feefcbb8fd1b.pdf
    • https://cdn-cms.f-static.net/uploads/4490266/normal_606c3b6c6c9bb.pdf
    • https://cdn-cms.f-static.net/uploads/4446030/normal_6044c20605c81.pdf
    • https://static.s123-cdn-static.com/uploads/4466143/normal_5fcfa932a759b.pdf
    • https://cdn-cms.f-static.net/uploads/4418385/normal_6044d23cab348.pdf
    • https://cdn-cms.f-static.net/uploads/4477163/normal_604b2f15c2f31.pdf
    • https://cdn-cms.f-static.net/uploads/4473388/normal_6052a13c89cb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sonopewobu.pbworks.com/w/file/fetch/144420978/malayalam_cooking_books_free_download.pdf
    • https://uploads.strikinglycdn.com/files/c4d8f372-3884-491b-a04a-91561a99a726/idiomatic_expressions_worksheets_with_answers.pdf
    • http://kedetuwi.pbworks.com/w/file/fetch/144427872/53580350425.pdf
    • https://uploads.strikinglycdn.com/files/1334e7a6-7ec7-46bc-b592-b0c75bddc99a/metal_gear_solid_2_raiden_save_frequency.pdf
    • http://lulatigono.pbworks.com/w/file/fetch/144537612/apostles_creed_catholic_prayer.pdf
    • http://fatakalewene.pbworks.com/f/tanker_charter_party_agreement.pdf
    • http://pinurakus.pbworks.com/w/file/fetch/144534141/sivavepumizuselag.pdf
    • https://uploads.strikinglycdn.com/files/ce51b3ba-3271-4974-87eb-a11de6d53d0b/lajotiwenidigudizimapuka.pdf
    • http://gozuwef.pbworks.com/f/11140117913.pdf
    • http://subazim.pbworks.com/w/file/fetch/144545775/super_smash_flash_2_cheats.pdf
    • http://jolowajuwijo.pbworks.com/f/bs_bahl_organic_chemistry.pdf
    • http://lokiboz.pbworks.com/w/file/fetch/144476154/what_is_liaison_in_english_language.pdf
    • http://savavaze.pbworks.com/f/67485304111.pdf
    • http://tukufidanega.pbworks.com/w/file/fetch/144426780/chapter_20_the_cardiovascular_system_blood_vessels_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/48954357-09d9-4b10-94d3-158dbc9ac6a4/arifureta_light_novel_volume_10_download.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80e.bin
1d223d87397b51d1dddcd9411bdbbdb5ffb0bf4acf5da32e8cf44d1fa1b4c115		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 5156 bytes
font_01_sfnt_off0000f97e.bin
4507a73529cd88cac2c22bff12a3cb41022b2f7c59a968674b61c6c7a6c763c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 11360 bytes

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