Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bacd7c4dd155ad…

MALICIOUS

PDF

81.2 KB Created: 2021-06-12 04:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 148c7048780e3d7a07b24de9e861fad7 SHA-1: 32b472bd21e8232b92d664e8b16c2e89f62e7c14 SHA-256: 37bacd7c4dd155ada34cc68dc53a53e03d47e6195c96df35b516009a091fb952
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains an embedded URI pointing to 'https://oniceh.ru/pbw?utm_term=the+lean+business+model+canvas', which is likely a phishing lure. The PDF structure and embedded content suggest it is designed to trick users into visiting this external URL.

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 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://oniceh.ru/pbw?utm_term=the+lean+business+model+canvas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477651/normal_6020ade513e8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5fcbc37bec418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_601421141efe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450152/normal_6060beaec4d4b.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://uploads.strikinglycdn.com/files/f15f2b7b-4970-4049-b404-2c413c92d6db/31230716502.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/balance_sheet_approach_to_international_compensation_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b696fc-baef-4b6c-9b05-23fee9b40716/tabimer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dffd6dc-4e2b-40dd-958d-21f01630c15e/48218925675.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144988545/71950632085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1005ff78-aef9-4863-a2ad-bf34c5384e03/rokujilu.pdfIn PDF document text
    • http://ragasegena.pbworks.com/f/android_auto_aa_mirror_plus_apk_download.pdfIn PDF document text
    • http://lalunanefiw.pbworks.com/f/18319120493.pdfIn PDF document text
    • http://votekotokuz.pbworks.com/w/file/fetch/144653364/54018718167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b341a0-9738-4132-aee2-92c03e86d23d/zojinuvide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2052dd82-1110-4995-b021-5fec09717575/27795307758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd77bcc-b891-4129-8c6e-c10830a27d2a/28981020793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5005f4-1b81-4edc-9d27-58868d838ec4/39288627984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605f7d4f-7c16-4412-82c3-2195e27c5541/zemebe.pdfIn PDF document text
    • http://milatufed.pbworks.com/f/95943180776.pdfIn PDF document text
    • http://gifavipa.pbworks.com/f/turning_radius_calculation_for_cars.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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5032 bytes
SHA-256: f6e5b902edd2995982247fa8aa3264f99d8ac9ef4e4a4275d4dca901b554411a
font_01_sfnt_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 11216 bytes
SHA-256: a978244a74ea89f1dfb791628af231f3ac44c9264b2f1f459241e421890e8bad
font_02_sfnt_off00012944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12944 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333