Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1d893c30fb8adc…

MALICIOUS

PDF

85.5 KB Created: 2021-03-22 23:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 26f9c92a650d7085f9b18f82103acb07 SHA-1: 09d76596590c72209c30249ec0d921ba571893df SHA-256: af1d893c30fb8adcdb8586dd13be3e6ee476b3409b88c55111ec5d573a4042a4
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 URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a lure related to 'social impact'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=what+do+u+mean+by+social+impact PDF link annotation
    • http://sezituza.66ghz.com/ranijitux.pdfIn PDF document text
    • http://kutefujuwusara.iblogger.org/25346269402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2ba4da-bd98-400a-83d2-e59380603f34/tejimelemudutokupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2276f685-d001-49c3-aba7-dfd74519a49a/how_do_i_set_up_my_uniden_answering_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbdb1f4-f28d-49a2-ae7a-04e8a73cc583/81429513315.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bukovusomotopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1513a3c4-e62e-4eee-8bbf-6f4f342f9b6f/how_to_identify_stihl_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/zefunebatoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5aa6b8d-4882-4723-8e04-d55e551dce8a/66176244951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f268c6-5c8d-4aa5-a51a-031247b5c76b/robiromodil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6fcdbc-80c7-4bd8-bc30-36e55fcedc2f/chapter_2_the_chemistry_of_life_vocabulary_review_hidden_word_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/transformers_prime_arcee_dies.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/escape_room_game_answers_level_37.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ad5e13-1068-4555-ac05-0f748864d02d/nelco_sierra_234f_sewing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/wizafufuxuwilis.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/webifagupatizinog.pdfIn PDF document text
    • http://mafixatoje.epizy.com/divenire_piano_sheet_music_free.pdfIn PDF document text
    • http://tufebogepamik.rf.gd/baby_doll_song_nagpuri_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/23284583337.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_off00010ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF6 5472 bytes
SHA-256: dd500091dc6c7791081b14eb2f210427682f1a967df03c1ed3ff1b78f8afd8ec
font_01_sfnt_off0001217a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217A 10992 bytes
SHA-256: f077e5aa00290a5a5a20ee9fb290116c24760fc9d9b9d183df0be3c343665222

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