Malicious PDF — malware analysis report

Static analysis result for SHA-256 962a6c978a4ef68b…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 04:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f460aa6708d32f767d707d2b6711930c SHA-1: c77f33d7a3e9409ee32ecb2a0c3bec7fb7e351e3 SHA-256: 962a6c978a4ef68b59880e757e101e04a3cc00b58679347c0b4a1370a00b56c6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant portion pointing to disposable hosting and potentially forming a link farm. The primary lure appears to be 'Monster Hunter apk obb', suggesting a phishing or malware distribution scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=monster+hunter+apk+obb PDF link annotation
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/c67eec32ab7507.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/5393353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_600f6e5dbe4ad.pdfIn PDF document text
    • https://kixofugowewo.weebly.com/uploads/1/3/1/8/131872146/dasutovaviti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480758/normal_5ff258aa82cd0.pdfIn PDF document text
    • https://badasemo.weebly.com/uploads/1/3/4/4/134482086/gozozes.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/dexunosozalogo.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/4140459.pdfIn PDF document text
    • https://lekusimije.weebly.com/uploads/1/3/1/3/131383821/rixuk.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/d9ee5f51-1e93-4d96-a523-2d4ce7c58cd0/12497591321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b057319-a8bb-4050-9690-cd3deac05553/philips_saeco_poemia_manual_espresso_machine_hd8327_47.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5508336-a8b4-41e7-a693-f826722ae961/garmin_430_software_update_cost.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_6a126924fda742beb15c7255a56060e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisoxow/roll20_add_custom_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/do_you_need_apple_pencil_for_procreate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae78ff33-0f4d-4ba7-9d48-ea7fb347676d/popular_graphic_novels_for_adults.pdfIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_0c2312d025fd4843a5bd209b6fa477a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/bootstrap_4_personal_website_template.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_8d84ed7483964a0d8fa23caa0bb1a6c1.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_cc8e29846685438bb26d14d8adbde11b.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_3027fb4bbae64a48a1be80b8d26c0126.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/4_types_of_sentences_worksheets_3rd_grade.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_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 5084 bytes
SHA-256: 1d44c4fc6fef7f123592b652dd8cb800102fa8f691ba66e6667e275b10c56355
font_01_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 22148 bytes
SHA-256: fcf8887d13d8d121cdf99d1f4bfb3c419d56a1716ba572591db2b1afa0af391d