Malicious PDF — malware analysis report

Static analysis result for SHA-256 1096578529a2dfb9…

MALICIOUS

PDF

87.6 KB Created: 2021-01-24 08:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f43c1dd396ebe33e6236b6763602ae68 SHA-1: 145f641a1a7ac461f369a6439b5655108b2d1a16 SHA-256: 1096578529a2dfb9c92f49d616efaacdf6bc1a547294ea80992c0c6925a18eec
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. The presence of numerous external URLs, many hosted on disposable domains, further supports a malicious intent, likely to redirect users to further stages of an attack or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/123?utm_term=coleman+generator+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fe2d09df042b.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/dhhCigR/25613658830.pdfIn PDF document text
    • https://rijifupipi.weebly.com/uploads/1/3/1/4/131453414/5630b52bdac7865.pdfIn PDF document text
    • https://napuguzexavuzes.weebly.com/uploads/1/3/4/8/134875267/vatilugidogop.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/99c5d0c4be3ed5.pdfIn PDF document text
    • http://doloxuwukur.iblogger.org/mcdonalds_uk_nutrition_guide.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/xetirebedabov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485800/normal_5fc9eebd58c41.pdfIn PDF document text
    • http://fuluwube.22web.org/allahabad_university_admission_form_2019_ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465941/normal_5fe3c063520d6.pdfIn PDF document text
    • https://cdn.sqhk.co/tobetusibu/nFjcghs/wish_apple_watch_38mm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebigibozudival.epizy.com/56736807604.pdfIn PDF document text
    • http://kuwosuz.rf.gd/sideboravuzosewomobuxa.pdfIn PDF document text
    • http://peburameg.epizy.com/turifuxigonum.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/75983016943.pdfIn PDF document text
    • http://govatojajij.epizy.com/payroll_management_system_html_template_free.pdfIn PDF document text
    • http://xokudofek.epizy.com/nsync_bye_bye_bye_instrumental.pdfIn PDF document text
    • http://nenimon.epizy.com/jadefuxikogewu.pdfIn PDF document text
    • http://lotapit.epizy.com/lobaxekefiraxefezemezomu.pdfIn PDF document text
    • http://lusafawapinoxe.rf.gd/present_continuous_worksheet_for_grade_2.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_off000119c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C4 5004 bytes
SHA-256: 17bde7748de1c48f2686b8cb68bbaf70ae638914f2cf2e9d52fb43bdb82fa3f2
font_01_sfnt_off00012abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABC 10928 bytes
SHA-256: 29848f8407b4ad19a4ff52f67a181bf5989f995bdb82e9746d4cf7bd8cd2cd3f

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