Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ab648d1bfd8b97…

MALICIOUS

PDF

70.0 KB Created: 2021-01-25 17:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bdb276b4f8fe8abc5fdcdc4db9a8dd6d SHA-1: 2aeab5c15fbd4627999a2534c5497d60b1f7dc6a SHA-256: a0ab648d1bfd8b97a83c41213b7eecf4d47182431595ec7ccb1b162a4688dfd2
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URLs, some of which are hosted on disposable domains, suggesting a link farm or payload hosting infrastructure. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=vba+format+cell+background+color PDF link annotation
    • http://fevuworejefe.iblogger.org/wilejenibabi.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/hh3SPtA/download_stickman_rope_hero_mod_apk_latest_version.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/a2de5.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/69694098577.pdfIn PDF document text
    • https://suzujiwome.weebly.com/uploads/1/3/0/7/130776055/palarosetuzuzonin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimudovi.epizy.com/pmi_agile_practice_guide.pdfIn PDF document text
    • http://gawuvuv.epizy.com/domajizogulelugubudadud.pdfIn PDF document text
    • http://xefivaz.epizy.com/56238572406.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/commitment_of_traders_report_release_schedule.pdfIn PDF document text
    • http://guwitus.epizy.com/sazasanovixepe.pdfIn PDF document text
    • http://nepumunu.rf.gd/wijaxenetu.pdfIn PDF document text
    • http://bijamujijupife.epizy.com/days_of_the_week_coloring_worksheets.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/arduino_uno_simulator_1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/90527817619.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_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 5332 bytes
SHA-256: c18807f1329add2d00f797bbd584d505152aee7448a893f176668b0c18a9d861
font_01_sfnt_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 10388 bytes
SHA-256: a36870deaf8fe793de3f543a35ecf732cb286aa52d29241110badc52f1b80f45

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