Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f3fdb807eedfe5…

MALICIOUS

PDF

93.0 KB Created: 2021-03-16 05:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 392856e7df499455fb36826ce0600f31 SHA-1: 74c427682ef8f9f51c1a244dc727067e441a6676 SHA-256: 78f3fdb807eedfe56d8bdc5aeea0754df2dd70a9ccbac1e74b363a59eb97ed54
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'lozipotod.ru', which is highly suspicious. The document body, though heavily obfuscated, suggests a lure related to 'fiszki angielski dla dzieci pdf'. The presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/award?keyword=fiszki+angielski+dla+dzieci+pdf PDF link annotation
    • http://creditreportfast.info/vakawexdd3g.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/iek9FEt/6312735497.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/cmijjgj/zewegirupovajaxakitebavas.pdfIn PDF document text
    • http://pubgmobiie.com/gupatonadowu4m4qe.pdfIn PDF document text
    • http://lianhua.life/atlas_de_netterz7t25.pdfIn PDF document text
    • https://cdn.sqhk.co/nujusowidom/eNwowic/airthings_corentium_radon_detector_accuracy.pdfIn PDF document text
    • http://remastacer.com/22336852895pixlb.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/tDL0mjd/rts_process_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/maths_book_class_10th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9531a962-c3bd-473b-886e-0d4bfb971299/where_is_the_water_filter_on_a_whirlpool_side-by-side_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/windows_media_player_windows_10.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_5f8973bd53624e32932dba55003e83ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebbf0da-684f-43e0-a4b3-3bd2edb4faa0/english_to_spanish_dictionary_with_pronunciation_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b93afd-a1fe-4bdc-b584-0997030a3254/fagebelotogawadaxa.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_d32aa247b9644aa980af22cdf8496cb4.pdf?index=trueIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_f392576c88274e42952e0935eed8b99f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/57824115822.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_36adab87fbf54275906cefa801b20dc2.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_6de727bf49cb4565afa6b7acaea7f4eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/1611_edition_king_james_bible.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_ded673ed09cb4665bd8c6d23df7b0d96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc1c3a0-0d79-4e73-b6ac-a23b094c8448/how_to_tighten_chain_on_jonsered_chainsaw.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_82d46c6669184c6993458e42b2db7768.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dabatisew/gekud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 5296 bytes
SHA-256: 5761423c6d10d8c06077f6d995003497c9d1879c03a9c601b9f85ff05b2a2c8f
font_01_sfnt_off000134d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D0 2052 bytes
SHA-256: 953da2a52d47a7511df70ac9e2bfa27c9b2c9c83997a120c944c1cdce221ad8c
font_02_sfnt_off00013d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D83 12232 bytes
SHA-256: 874da0600529371e0ef927f0ee7b617f1a0488398e74fdc0b31dc81f043cdd2d

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