Malicious PDF — malware analysis report

Static analysis result for SHA-256 65db45a9617c8f7e…

MALICIOUS

PDF

85.7 KB Created: 2021-02-21 10:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 519321e5db350fa4589143d6ac0eca9d SHA-1: 6aa3d251293de16cfcdfee452175530f68fef919 SHA-256: 65db45a9617c8f7ec1fd8f9c44c193b9cc38661ba99145606f99de6c8f4a9ea4
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to manipulate search engine results. The embedded URL `https://jottigo.ru/wix?keyword=download+angel+beats` suggests a lure to download content related to 'angel beats', likely a phishing or malware distribution tactic. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=download+angel+beats PDF link annotation
    • https://cdn.sqhk.co/desixurate/icgcWFX/cowboy_chicken_menu_sides.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/bPhaEji/tribles_inc_upper_marlboro.pdfIn PDF document text
    • https://wikifezetusu.weebly.com/uploads/1/3/5/3/135306480/3720343.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/iaihJjh/golden_boot_award_women_s_soccer.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/gjbjcqu/horror_pennywise_clown_house_escape_mystery_game_apk.pdfIn PDF document text
    • https://fudexevanege.weebly.com/uploads/1/3/0/8/130814713/ladanuto.pdfIn PDF document text
    • https://vomoxolakixirum.weebly.com/uploads/1/3/1/4/131438067/wadikenevolirok-punidajusigaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/MaicWUV/hackear_world_of_bingo.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/xovekolamoxe/xojopitudulaku.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/greek_mythology_names_female_goddesses.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/febojatexotevotaxaduv.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/asphalt_8_pc_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/child_care_subsidy_application_bc.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/bevekapegemesobuxon.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/sikijonepuloxosowenis.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/dasafumij.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 6164 bytes
SHA-256: 83aae145d72c742d7ea6f36e2a439b763504462920f0336365d68b58fdfdcb56
font_01_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 5128 bytes
SHA-256: 081afa52c4262368d705b970e1e8a08a72d431aa1ac749dd141d7d9acabaa67d
font_02_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 10184 bytes
SHA-256: 6a57dad3e16b00f566b21fd47bca194f8d20f8e2f6e5379bc5804070d1b53c32
font_03_sfnt_off00012bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCB 16368 bytes
SHA-256: 2c5f51a476b4274b6b900fbba81fc97c04b4f1697b1aac53cf696a9c53e0885f
font_04_sfnt_off00014185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14185 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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