Malicious PDF — malware analysis report

Static analysis result for SHA-256 4620b280b86371cc…

MALICIOUS

PDF

73.0 KB Created: 2021-06-14 19:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6360fffd19370fa5b807c37a88d2597 SHA-1: ce0e7cb907e550d251f8dc3153d7196a84477843 SHA-256: 4620b280b86371cc290a2c993b749048a678de67c99ae9ec9cf8156d2a31e5b6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'industrial boom answers', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/pbw?utm_term=dbq+11+the+industrial+boom+answers
    • https://cdn-cms.f-static.net/uploads/4428083/normal_6036fdeb37331.pdf
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fe40ea14eda2.pdf
    • https://cdn-cms.f-static.net/uploads/4469827/normal_6046870d7e0a9.pdf
    • https://static.s123-cdn-static.com/uploads/4406771/normal_6000f3e5c883b.pdf
    • https://cdn-cms.f-static.net/uploads/4495707/normal_604ddba315ead.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6018a4c4d7dd0.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_60c414b812844.pdf
    • https://cdn-cms.f-static.net/uploads/4485446/normal_6062974fd08d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d59bd7f-2d8c-4ceb-b97e-2b6ab0fd11d0/zone_of_proximal_development_example.pdf
    • https://uploads.strikinglycdn.com/files/c9787ab1-578e-4838-960b-514cfea7c78a/plantronics_bluetooth_headset_instructions.pdf
    • https://uploads.strikinglycdn.com/files/8ed97e26-a352-4ce3-8d21-3a07a63bac95/much_ado_about_nothing_2012_movie_summary.pdf
    • http://fufitiruw.pbworks.com/f/free_robux_gift_card_codes_2021.pdf
    • https://uploads.strikinglycdn.com/files/1c321de0-6956-4fb3-a454-cbf2a6176ca2/gowagosigiwa.pdf
    • https://uploads.strikinglycdn.com/files/01c69899-05c1-42b5-990d-850efbf04a7b/does_newt_die_in_the_maze_runner_movie.pdf
    • https://uploads.strikinglycdn.com/files/d3bce62a-d867-44f5-af6b-ebf072df5ac9/tusorijigifituwikuka.pdf
    • https://uploads.strikinglycdn.com/files/f5bb5351-4695-4c20-9398-fc7974c8970a/xogotakefatojorimiditokoz.pdf
    • https://uploads.strikinglycdn.com/files/cddb196c-a32e-4147-8a19-52cdf0f339ef/23716330905.pdf
    • https://uploads.strikinglycdn.com/files/0c59ebda-4f49-4cf9-b452-64a52b45d251/diary_of_a_wimpy_kid_book_14_release_date_2019.pdf
    • https://uploads.strikinglycdn.com/files/89fd781c-b2c0-43c7-82ba-99c13a9a4a9d/why_wont_my_gas_fire_ignite.pdf
    • https://uploads.strikinglycdn.com/files/63e9b30c-0b42-42a3-af60-11a54a98e17e/does_verizon_have_any_deals_on_iphone_11.pdf
    • http://fuvotobike.pbworks.com/f/simple_present_tense_exercise_with_answer.pdf
    • https://uploads.strikinglycdn.com/files/9f928f85-6cf9-46e2-b00c-740958801af1/jack_and_the_beanstalk_story_pics.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_off0000dd64.bin
e4d1f3166875ca61e75b0aff1173dee70f8600a99bff74417a1be9c1ba95af90
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 5472 bytes
font_01_sfnt_off0000efe2.bin
4632f7d84d0b261e3c8821b21330ce4a589cf8ab1b89ea7cfcab123d19c7ccc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 10936 bytes