Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff16c2deda336b72…

MALICIOUS

PDF

216.8 KB Created: 2021-03-30 10:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b91e363fecc6102eb091a51766c413 SHA-1: df9e1b163a8dc27aec63004a8e8b3597f420bc9f SHA-256: ff16c2deda336b7216865035627d86e73d39cbf64be8719550ce991b9f981922
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a disguised search result page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9597

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://golowaki.ru/wix?keyword=ge+spacemaker+xl+sensor+microwave+parts
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5fe2612e47e5e.pdf
    • https://cdn-cms.f-static.net/uploads/4481663/normal_60143ff066178.pdf
    • https://static.s123-cdn-static.com/uploads/4496148/normal_6004f5147ec2c.pdf
    • https://static.s123-cdn-static.com/uploads/4465127/normal_5fef57d8cd254.pdf
    • https://cdn-cms.f-static.net/uploads/4407781/normal_601d861faf465.pdf
    • https://cdn-cms.f-static.net/uploads/4366957/normal_600f7ffc08b12.pdf
    • https://cdn-cms.f-static.net/uploads/4494888/normal_5fd3161f93357.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ec3b83c1-3abe-4222-878d-7b36892a25b7/biblia_de_estudio_teologico_sociedad_biblica.pdf
    • https://uploads.strikinglycdn.com/files/b68c273a-0903-46fc-8bfe-bc47025c7fff/starting_strength_advanced_novice_routine.pdf
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_40ac978074cf483fb7b302c9d175b9ae.pdf?index=true
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_9cd85ec3438146ea827df712df86805e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e253fcfd-8583-4eb1-841d-c9574a4cb3af/the_merry_adventures_of_robin_hood_by_howard_pyle_characters.pdf
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_fe21d104f97d4c8db353041173e0d3f9.pdf?index=true
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_49d29ad557a74429a67755c37aa85468.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67c98a9a-e289-451d-b40c-f1fc8e8f81b5/soxanizafifatetodoguku.pdf
    • https://uploads.strikinglycdn.com/files/9dd9228c-bd05-46a9-bebf-27670f1f40b3/lodovukuj.pdf
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_f7b5fe5378af4896bf0a696e21963742.pdf?index=true
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_a84877d4f47a4940ba18965a0169b135.pdf?index=true
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_b9d071286fa5424d9ac2963124a90887.pdf?index=true
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_afabdde68f824f0aa114bf2f2acf8aa2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7b90cedf-4fd4-48be-831c-2927db9fd83c/list_of_famous_grimm_fairy_tales.pdf
    • https://uploads.strikinglycdn.com/files/74f349f1-8a06-43a3-be5b-d3c8c972e441/6651155435.pdf
    • https://uploads.strikinglycdn.com/files/17edb6e3-a5b5-4cfb-a8e6-4aa4d7e3bc2f/87092831187.pdf
    • https://uploads.strikinglycdn.com/files/18cbcb99-7fb6-4ba6-9d44-77ef47c65722/72863083449.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_off000311b3.bin
211402d84157087fb373bc3bdfeb181aff3fe545c4b33b02ca8037200027b8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x311B3 5392 bytes
font_01_sfnt_off00032414.bin
0a1410c6c0b0e70b59507a88dc3a1689bbff7c0395e90901a4a19ba46be2e89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32414 14732 bytes

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