Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bd0509d7849ffb…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 23:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a1e8d8de3138fe02819f84acb7dc1e09 SHA-1: b53a505e8e253eb4f98ad12e5944771e2629d01b SHA-256: 49bd0509d7849ffb2ea2ffee9a2f410d0d3f00ac361513ec8d42e82935bc3a8f
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the user is prompted to call a number. While no scripts were extracted, the presence of numerous external URLs, many hosted on disposable domains, suggests an attempt to redirect the user to malicious content or phishing pages.

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) or Microsoft license-boilerplate 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://jumiwimov.ru/strik?utm_term=jazzy+power+wheelchair+manual PDF link annotation
    • http://xevamoz.mygamesonline.org/how_to_cite_a_article_in_apa_style.pdfIn PDF document text
    • https://vinokiwofexuge.weebly.com/uploads/1/3/6/0/136095936/nudurokukumud.pdfIn PDF document text
    • https://guzarimu.weebly.com/uploads/1/3/4/6/134608133/2957962.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/vetunogoberatixizan.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/susilo.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/yje5Ahe/88460463532.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxaxebowe/Gtjjid3/pagekukabidukubagun.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/aRgfhgb/pexesezuxikewemepogujazo.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/zivamowitib.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/bajamafat.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/hyfwNgc/crashing_season_2_episode_1_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/ibiejhf/35981145352.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/zabevog/xutokilirezenosepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42884648-ab20-42a4-b1bc-91559db037c4/piano_adventures_level_2b_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/nimavalekomave.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/star_chart_app_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/blue_cross_blue_shield_texas_provider_manual.pdfIn PDF document text
    • http://vidilig.onlinewebshop.net/gekofuxobetemazeseju.pdfIn PDF document text
    • http://mepitar.atwebpages.com/safe_agile_principles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3724c6-3ceb-4b8e-9bb0-e7d542f3da56/how_to_beat_team_aqua_in_lilycove_city.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_off00010d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D28 5228 bytes
SHA-256: 120b4ea56e1c4e8dbf6fd51d6bdb05ad48db47505f13953f93b96c473a5e54ed
font_01_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 11776 bytes
SHA-256: 776ef310d980a755797b4ebc9d8c79dfed8328451ca7f7da4cc41fea78a62646

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