Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dfd79027b23d67…

MALICIOUS

PDF

82.3 KB Created: 2020-12-30 08:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 31791ed82c438807cb4b33567b49d028 SHA-1: 989c43179e51accaa28b13cb4a20d9b670348802 SHA-256: 62dfd79027b23d67d3618d308f1e15b5e2b42321f468480f6fd5877b856ce7db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, indicating a link farm for SEO manipulation. One prominent URL, 'https://trafffi.ru/123?utm_term=black+and+decker+belt+sander+size', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffi.ru/123?utm_term=black+and+decker+belt+sander+size PDF link annotation
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/4336948.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/dogagavavaxub_juxaroku.pdfIn PDF document text
    • https://pugefaguza.weebly.com/uploads/1/3/5/2/135299010/4750164.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/tajatir_fipur.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/gcWWahh/horse_run_in_shed_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_5fe371035121a.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/hHicies/56723208166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8daca7a4b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nefunupu/blank_monthly_calendar_template_september_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/accomplishment_report_in_mapeh_subject.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/wenemalitizinajape.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/ark_ice_wyvern_egg_spawn_command.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/47234535180.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/burn_it_down_remix_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/best_affiliate_marketing_platforms_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/martin_castille_funeral_home_southside.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 4916 bytes
SHA-256: 12b7ac17c57d90336374c4b66703e54b595bd1a403a93a66e2e4e36716ae5f0f
font_01_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 10360 bytes
SHA-256: c767cdf74a258dfa6300453c7c5964fcb7b4d65a9a16b7373593faf0f5b6619f
font_02_sfnt_off00012dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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