Malicious PDF — malware analysis report

Static analysis result for SHA-256 0566232100c5ff6d…

MALICIOUS

PDF

85.4 KB Created: 2021-04-06 13:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 14c5276056a9388c8fe3807526b42df1 SHA-1: 2ac5ba94bbeb1256689597644d572a6fed47efd8 SHA-256: 0566232100c5ff6df4fcd16351d01b789b639ebc79a7b62520a51a9278c8890b
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains references to 'Como agua para chocolate translation' and is generated by wkhtmltopdf, suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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/strik?utm_term=como+agua+para+chocolate+translation PDF link annotation
    • http://scm03.ru/dewevedorerilunawaludivc0min.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/giDojcR/tikef.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/jidxicR/game_of_heroes_three_kingdoms_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/3ghaYge/chinese_checkers_board_online.pdfIn PDF document text
    • http://fruktovik.com/the_haitian_declaration_of_independence_summaryxesh7.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/tid91Ma/gixudipigozad.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/fhiRMjg/vaxano.pdfIn PDF document text
    • http://boevoenlp.com/nokipoxuziwidofavj97i.pdfIn PDF document text
    • http://familyit.info/english_comparatives_and_superlatives_exercisesfb3oc.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/fnjiJQb/godujipu.pdfIn PDF document text
    • http://indonesia2health.online/70416660679obnun.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/mhahige/38823330698.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/vygotsky_cognitive_development_theory_summaryk5kry.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/gs0O875/34413641491.pdfIn PDF document text
    • http://busivel.xyz/what_is_the_story_of_les_misrables_about92wvz.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/9ifjhyJ/62922374726.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/sazomo/chicago_manual_of_style_quoting_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/the_tourist_game_metacritic.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/cyber_hunter_game_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/aruba_switch_basic_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/does_logitech_k400_keyboard_work_with_samsung_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/90599935553.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/zaritenajerovegisiwinipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/51864330411.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/annual_report_cpn_2017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 5252 bytes
SHA-256: c9e89f18899ba745a1e983da9880512d872e12c56fd93d903b78e840076d3bbf
font_01_sfnt_off000108a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A5 12344 bytes
SHA-256: eb177816d453c3a4643429fe04381f9a564d2759acfe128acdc1f47228a785d8
font_02_sfnt_off00013137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 16068 bytes
SHA-256: 1f10eee925fbe99070ce930aad2781db9cd53dceef6a88ee5d5c61933f6ad089