Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b5724f61b67600…

MALICIOUS

PDF

70.9 KB Created: 2021-04-01 08:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 844b67e1ad21729cfb499081b3aeb3da SHA-1: 4499dfaccbd8a8e828a35eb883dd7ec16558f557 SHA-256: 62b5724f61b67600ded0e6e6c9ea36d2cec93acb9472516fd35e3eb867936adb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external URIs, including a primary link to 'https://zajinet.ru/wix?keyword=why+was+the+pail+pale+punchline' and a critical heuristic firing indicating a mass external PDF link farm starting with 'http://modernstyle.pro/25677666817a3k16.pdf'. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing content, but the presence of these links strongly suggests an attempt to redirect users to malicious or deceptive content.

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 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://zajinet.ru/wix?keyword=why+was+the+pail+pale+punchline PDF link annotation
    • http://modernstyle.pro/25677666817a3k16.pdfIn PDF document text
    • http://slmit.fun/wunufunikumakixiwatep4ycr.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/kunuvo-zatib-mafuluvimipi.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/1423417.pdfIn PDF document text
    • http://sis-paypal.com/46873890413qv1xc.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/watajive/lasagna_with_butternut_squash_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/korepus.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/91456780764.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/honda_performance_parts_south_africa.pdfIn PDF document text
    • https://c93e3e17-565c-496b-95a0-45fea83b015f.filesusr.com/ugd/cd9bb8_d817b8b08d1a4affbcdd93b2d4be48a2.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_1b5de1e87fda46ee9c5e3a7d4959cca7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/petty_cash_summary_report.pdfIn PDF document text
    • http://mufifofoge.epizy.com/luxovagelu.pdfIn PDF document text
    • http://rasiverud.epizy.com/calendario_2017_colombia_con_festivos.pdfIn PDF document text
    • http://watusinujebisu.rf.gd/33977290527.pdfIn PDF document text
    • http://zorumiwopa.rf.gd/lg_li-_ion_battery_datasheet.pdfIn PDF document text
    • http://garuwefusu.epizy.com/video_above_all_powers_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/zifesuzoxuzifixawuri.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/how_to_change_amazon_kindle_fire_battery.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_off0000d953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 5132 bytes
SHA-256: 08d6acf34623e542febfc94fb82a80488fec03b1d78ba6edd270376b926cfba4
font_01_sfnt_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 10468 bytes
SHA-256: 28054261ed4510ff84c80d3362938d820518c76dd5ff5d4099653f9cc248a3ab

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