Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2a2a036ccb7b7d…

MALICIOUS

PDF

81.1 KB Created: 2020-12-28 20:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f57af15faa2bfbc0c678ec50dbf57784 SHA-1: bcbb3b21c45677e11056633b9c80c0bd838af6c8 SHA-256: fb2a2a036ccb7b7dc50e15d9f591f9b2c5965089984bea995d2f212c8cb3591d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://traffnew.ru/strik?utm_term=orca+survival+simulator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fb37fb000c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f950d4156672.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/BuMlgec/spastic_colon_diet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fabc23b8b236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f89aa85d641e.pdfIn PDF document text
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/sozipewu-zinudexaberij-keros.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/tituxavepu.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/aROhglX/hymns_of_praise_and_thanksgiving_with_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/idTQabR/kizajubuzojodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416495/normal_5fcf520180516.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/gumegulaxi/free_chain_reaction_game_for_java.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/arc_length_and_radian_measure_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/bookshelf_vs_sequelize_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/kuvipefepebi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/google_fonts_link_stylesheet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FC 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off0000d5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 5032 bytes
SHA-256: 0fd036f4e92531032e43feba30e63ec0517bbb7bbe42fdd8b32f22600e213f97
font_02_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 2504 bytes
SHA-256: 123b1ab14fb65fa98a494cb875f9718bd41ec25ef62475bfa64e60647bdfa566
font_03_sfnt_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 10504 bytes
SHA-256: 724ee9b20923cdfe6504be0fe8002e0ed1a72f7b703dcbff19e0de0a22851aa0
font_04_sfnt_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 17424 bytes
SHA-256: 8207d6f0fe5b5ee7e711444887e37baf9758fc5cee24164ac3da04d20a330f14
font_05_sfnt_off00012ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBE 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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