Malicious PDF — malware analysis report

Static analysis result for SHA-256 637991561dd56b34…

MALICIOUS

PDF

75.4 KB Created: 2021-01-25 19:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 50562ff6fd0f0f0a11eda07846bd3ea9 SHA-1: 3482f293656ca2326e38d7ca851752a0b4effb99 SHA-256: 637991561dd56b34add5309a59903c89113d5f59afa7c35678ab928498c927d9
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though obfuscated, appears to be a lure related to 'bartender label printing software free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffi.ru/aws?utm_term=bartender+label+printing+software+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ff5d0b079da5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_600c52dae0771.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/aa90fa9.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/pivomijuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fdc12c6c36e5.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/3f03ef0.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/3cf3afe26404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5fe844eb19d87.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jgeldnM/basic_sales_and_marketing_skills_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/HNZTjaD/cute_backgrounds_for_iphone_7.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/45928380577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupeguv.epizy.com/blister_packaging_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/nokolebasejewexaxig.pdfIn PDF document text
    • http://xumizaxojumiko.epizy.com/xubefibirizitezejoxogukuz.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/all_power_generator_apgg6000_manual.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/tadurabavem.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/age_of_adaline_movie_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/54498455414.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/25755613419.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_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 5492 bytes
SHA-256: cd4803ac828f0086c6fc26df40ad673027491fe051917082818a1b32591693cd
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 10068 bytes
SHA-256: 37ee028912018aabb908ce5029e4c6504155d46cf6bd176eb1f7fd2db0896fd9

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