Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfa17694eb18d07…

MALICIOUS

PDF

75.8 KB Created: 2021-05-15 16:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01aa21f995efdb0371a5c215e9977554 SHA-1: 1197242dca7f0ca5b8eefde0a7d159f319aa54eb SHA-256: ccfa17694eb18d07f8d55ee281b02ed497fa5d9ca9f74af1d62bee3715a4a1f7
156 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 a large number of external links, including one pointing to a suspicious URL that appears to be part of a link farm designed to mimic search results. The document body, though heavily obfuscated, contains text related to search queries, further supporting the phishing lure. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://pelibifir.ru/strik?utm_term=what+are+the+parts+of+a+sink+drain
    • https://cdn.sqhk.co/fijumirana/jdQhbfs/32237098766.pdf
    • https://cdn.sqhk.co/bikakigiben/bPEjhfj/paquete_de_stickers_para_whatsapp_memes_iphone.pdf
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/808377.pdf
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/zofatafefalim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_f0cc4580cada4c60ab5a20436eeaf44e.pdf?index=true
    • https://s3.amazonaws.com/gadumagabusodel/tratamiento_de_acidosis_metabolica_en_pediatria.pdf
    • https://s3.amazonaws.com/nafamaragisek/android_studio_system_requirements_cpu.pdf
    • https://s3.amazonaws.com/bamepofewalada/how_to_fix_magic_chef_ice_maker.pdf
    • https://s3.amazonaws.com/novipaliwid/romerumadenudepitalip.pdf
    • https://s3.amazonaws.com/lurutopobi/minecraft_redstone_handbook_piston_door.pdf
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_4e842f4fb2d3484bad53f6acd253fe84.pdf?index=true
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_6918e2ceb8b64a4c83b2881ebca377a6.pdf?index=true
    • https://s3.amazonaws.com/bokexizometun/pixijatijik.pdf
    • https://s3.amazonaws.com/buganabowumujef/messenger_apk_older_version.pdf
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_fe36275cab49466e9f1902e49432301f.pdf?index=true
    • https://s3.amazonaws.com/zaxefemebidaz/amazing_spider_man_2_apk_highly_compressed.pdf
    • https://s3.amazonaws.com/takateg/79674093151.pdf
    • https://s3.amazonaws.com/polexebuj/sheridan_500_thread_count_sheets_review.pdf
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_73f8088bbbce44f0902d2ec0fd6d291e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea37.bin
97b80b28c4017479d5249c2eb635edc81f1ca52e20bdbf261c7d87696dc106ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5176 bytes
font_01_sfnt_off0000fbda.bin
c9af54be574ccb1710e618295a14f56d6d5d148c013501e111300d4ed2e108ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 11160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.