Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b7462454c2c9d8…

MALICIOUS

PDF

81.2 KB Created: 2021-02-20 17:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e76c0d335bae43ccd71621fbec884c89 SHA-1: b0fda30960273f5b614d30b922936d84bb228b18 SHA-256: 19b7462454c2c9d82634180f6dedea932119a8a8ef785302a3aae13b73f20d0a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as a phishing trojan by ClamAV and ML classifiers. It contains an external URI and an image lure pointing to a redirector URL, suggesting a phishing attempt. The document body, though heavily obfuscated, appears to be related to the lure text, further supporting the phishing pretext.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=disadvantages+of+sexual+reproduction+in+animal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449775/normal_5fc8bd5231d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_6027c08cc8f46.pdfIn PDF document text
    • http://7gusevshop.space/grohe_thermostatic_shower_valve_temperature_adjustment9hakh.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/8beed4c3d8e6c.pdfIn PDF document text
    • http://onatural.space/creation_charles_darwin_summary80ldz.pdfIn PDF document text
    • http://13millions-warzone.store/horse_racing_3daxe17.pdfIn PDF document text
    • http://lady-bug.club/77441100936kzw96.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/8991347e9.pdfIn PDF document text
    • https://tejukazirinari.weebly.com/uploads/1/3/1/3/131398521/dozuburofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489740/normal_5fceb0f40a40f.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/kebesinupin.pdfIn PDF document text
    • http://svoydvalend.xyz/difukonemefadafowibmfy0.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/winatewalum.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/c331ee.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/nevovumowa/hdfs_dfsadmin_report_command.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tapapereforotewozit.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/559449850.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/lanirobukadubejifut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 5604 bytes
SHA-256: 1687c95a2bde2378da4dba4be3a4ea1e94e5340e8604f890e30b9a8d3f0bdb7d
font_01_sfnt_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 10760 bytes
SHA-256: 05d29fca0faf31db9093c3773dd482aefb50d00044f95d17adb77d6a626df9a9

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