Malicious PDF — malware analysis report

Static analysis result for SHA-256 722ac31bcfe1df75…

MALICIOUS

PDF

77.8 KB Created: 2021-04-06 19:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4443c80a117b7a453dd22927f814a10 SHA-1: 04438b54edbfc4ee481d400f4b9de2d9cc7d4996 SHA-256: 722ac31bcfe1df7539295f6504687a5ce8a8984ba684ca4985de8b61b3a55e1c
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high probability of malicious intent. The presence of an external URI pointing to 'maypoin.ru' suggests a phishing or credential harvesting attempt, disguised as a syllabus document. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/award?keyword=ctet+syllabus+paper+1+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/kapipota/hj8ii7Z/viwominomibezabetenajiron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_600a9195e6c97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5fcc6707e42ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_6066d8e4c9630.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/igrjjgg/dixie_d_amelio_song_lyrics_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/Igdidje/2019_new_audio_song_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_606769042eff3.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/icA1hBO/42012045015.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/KhgXjjn/woodworking_plans_projects_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_5fd5f7e048d9e.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/088eb222-7d31-43b3-ad11-1e6781c49e3e/casio_g-shock_rangeman_connected_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/95097511851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b400c4a2-c01a-402a-829b-1f23f4e66fc3/9580432274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b50528-fd57-4a0a-8d69-7e313451105f/57469686599.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/instructions_on_how_to_use_a_prestige_pressure_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6451c4b-f068-4f98-aac5-38be8bfadc4c/zonirobajolosuverubevo.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/utorrent_ing_slow_with_lots_of_seeds.pdfIn PDF document text
    • http://falepafi.epizy.com/what_is_knowledge_self_efficacy_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/portable_mp4_to_avi_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/utorrent_for_mac_app_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda77d06-209d-4000-b3fe-bcf6460509c6/que_es_la_adolescencia_segun_anna_freud.pdfIn PDF document text
    • http://ganenimipoje.epizy.com/23772785099.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_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 5508 bytes
SHA-256: d8604a9975174ae25f5c902228ca3f8258cde852d010eb61350fb5bccb469eb0
font_01_sfnt_off00010449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 10608 bytes
SHA-256: 693208d4d08de1afd88be5993afba947be2c26a9810fa5ec81f14a5b00dba9b3

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