Malicious PDF — malware analysis report

Static analysis result for SHA-256 543d0f56ada3379c…

MALICIOUS

PDF

87.1 KB Created: 2021-04-13 10:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6c8ad28fd5d9b4aa7f401bbe927e83d6 SHA-1: f9dd1b759f774fd2e70c2f2136b28af5beb070ea SHA-256: 543d0f56ada3379c5ea38ea17279288bf5f4523b0c1b5a27cc8b2f9024d7f7a4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to installation instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=jenn+air+wall+oven+installation+instructions PDF link annotation
    • http://kobodesuwid.getenjoyment.net/videpigunulitazugajomam.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/79583500923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_6030a841b6e30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387433/normal_5ffd7e79f3467.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wuxuxumeso.rf.gd/fopisekiluvolemibixidinaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/labesezulopotedud.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/learn_russian_free_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/how_to_connect_rex_c100.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/oracle_ilearning_quiz_answers_section_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44afa52d-4469-4d30-b777-7a85772ffae1/how_to_spot_a_fake_national_insurance_card_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/android_browser_auto_refresh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6409caba-7260-404c-bffa-e567c6bb4fdf/how_much_does_it_cost_to_replace_an_ipod_touch_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/beats_studio_pro_wireless_in_ear_headphones_wireless_bluetooth_earphones_with_charging_case.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/veruwowunosu.pdfIn PDF document text
    • http://pekoguwomigurup.epizy.com/automower_450x_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/pokemon_quest_eevee_evolution_guide.pdfIn PDF document text
    • http://xekokopadupino.rf.gd/pride_and_prejudice_1813.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_off00010c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 4816 bytes
SHA-256: 2258025929e75247cbb8aba298276100d0569ef0ee8a337e520884ab3a79131e
font_01_sfnt_off00011cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC7 10640 bytes
SHA-256: 26c3a1de0003ae379b479b86417d165a7206117bd93ea7f5d6cff10218015af0
font_02_sfnt_off000140f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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