Malicious PDF — malware analysis report

Static analysis result for SHA-256 8655fef4e4bf8105…

MALICIOUS

PDF

77.3 KB Created: 2021-03-20 10:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9d14411888c7337589f2ceaae11d0b54 SHA-1: 1e569a03ca3b544382dec1dec9f0e51d2ffb7982 SHA-256: 8655fef4e4bf8105fe8461b466f6f8269d80aaac3ef410f616e3b24a7c1d8b13
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the ClamAV detection name indicating it is a phishing trojan. An external URI heuristic points to a suspicious URL, 'https://jumiwimov.ru/wix?keyword=esl+giving+directions+worksheet+pdf', which is likely the primary objective of this document. The document body, though heavily obfuscated, contains text related to 'esl giving directions worksheet pdf', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=esl+giving+directions+worksheet+pdf PDF link annotation
    • http://rollernefritmassage.xyz/how_to_write_a_book_review_lesson_planfcdoz.pdfIn PDF document text
    • http://sethel.xyz/45424639655bhi6b.pdfIn PDF document text
    • http://genusttwsr.fun/the_way_of_the_psychonautj7liy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_604219561e402.pdfIn PDF document text
    • http://zufabud.22web.org/19374669804.pdfIn PDF document text
    • http://qunit.space/98163451903mygk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5fdbc2004b3c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surobufalinaxis.epizy.com/cardiac_muscle_structure.pdfIn PDF document text
    • http://zesositug.epizy.com/arikil_oraal_malayalam_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/tifevedogumumimesoluda.pdfIn PDF document text
    • http://kifagovatu.rf.gd/marketing_research_an_applied_approach_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/66659613741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2087c0-dabb-46e8-ad02-6ea651ef4eae/dadonaxujabovavudoziw.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/93019989015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bf9e14-67e3-403c-93dc-af62af4125a0/ion_block_rocker_plus_100w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e7771a-032b-4a8b-92db-c4dcf0e632e4/oregon_bar_and_chain_for_stihl_ms180c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb38dc6-0633-4e80-a1b4-3e98bac74fc7/forakasakadojegebimajagev.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/92621069345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ad070c-6aa0-4ea6-b50f-2e2e25ee6162/nomedobodapijepufokafufu.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/motesudegaruzuxifesivifi.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/how_to_reduce_practice_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/translating_algebraic_expressions.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/42285782781.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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 5380 bytes
SHA-256: f35ee294ffe9b1f6fa3f35ad6acc2cf756c4f149f35733249e27981d806e87c5
font_01_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 10736 bytes
SHA-256: 77dbb5423c8204a9451c93bc6bf93253e55f181109d7e673c594b1a88e009e20

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