Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b41c37a578bc86…

MALICIOUS

PDF

72.3 KB Created: 2020-12-16 18:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f4843ed4c15608eee8a81856f2f839c1 SHA-1: 17985e64ac5d40e7db681bf21d387b4018f93660 SHA-256: e8b41c37a578bc863ab7b91521c53dada431eba57f14b181ac9144167107c58d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or redirection mechanism. One URL, 'https://traffset.ru/strik?utm_term=resnick+and+halliday', is particularly suspicious and likely leads to a malicious site. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=resnick+and+halliday PDF link annotation
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/7e446d41.pdfIn PDF document text
    • https://velizixevapejaj.weebly.com/uploads/1/3/4/3/134376636/af9571e5e9ec1ee.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/lesepapusojifax/80431515038.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/avast_antivirus_2015_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/c_o_form_e_bn_th_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7259f54d69c5962340084/t/5fce264a5177ea328cebb634/1607345738734/free_fire_try_now_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/89655542606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f90cabc-80b4-4df2-b57d-31d2d03f69ff/archeage_regrade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/big_blue_book_of_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f17140-2b94-4977-9af4-c8302ca1da9f/bottle_flip_3d_unblocked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfe7c1491241adc45f142/1606221437026/27334948890.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wujavupajawewu.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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 5104 bytes
SHA-256: 4036740219330f51ea6dc2d8be565bc43ab2d60fe8f0128e8538f01dd1659e1a
font_01_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10712 bytes
SHA-256: 5377f60c8a18ac1cea221cf4e713a53fa787b6bc9223f46af6722e2e820ab80c

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