Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f0f138487fea71…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 23:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d3e09566c77525b9b5f6fa5af82a595f SHA-1: 11e503c3002925bb54f7757ce674e8cbb641feca SHA-256: 47f0f138487fea71d18ea9908650ec46235b4dd9d68f52c228c2b552dae80bb0
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to link farms and disposable hosting, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically identifies the document's intent to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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.
  • 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/strik?utm_term=what+is+craftsman+assurelink PDF link annotation
    • https://cdn.sqhk.co/beledufe/gfZjf4N/kubofazizesixuxomewik.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/ghihgdt/maximum_carnom_lego_set.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_606576cb77d52.pdfIn PDF document text
    • http://vefavirona.22web.org/98558262976.pdfIn PDF document text
    • http://sukojas.22web.org/tekodefipuz.pdfIn PDF document text
    • http://vimebadu.22web.org/babelutefetuvepetasevukex.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/tgiijcO/vixapora.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/ebHibRA/mine_blast_level_30.pdfIn PDF document text
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/gagomemizekuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_602636053ac79.pdfIn PDF document text
    • http://jewofuvivonog.getenjoyment.net/ukulele_children_s_songs.pdfIn PDF document text
    • https://fuxaxogajumuw.weebly.com/uploads/1/3/1/4/131406658/balipoxigokanabin.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/lesafepu.pdfIn PDF document text
    • https://naleletilasimoz.weebly.com/uploads/1/3/0/9/130969891/2418430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_6044d2f315b6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepuzoxol.rf.gd/gutujusixiruxemigonufibe.pdfIn PDF document text
    • http://duvodix.myartsonline.com/ktm_990_sm_owners_manual.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/27027980952.pdfIn PDF document text
    • http://migozojejaga.rf.gd/what_is_the_oldest_sculpture_in_the_world.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/95503394758.pdfIn PDF document text
    • http://gakofijos.epizy.com/what_does_purple_flower_meaning.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_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 5196 bytes
SHA-256: eb706a160be4edaf5e9f00e0f5e1b64f74435d10088fad46f57cbada9a45d0ba
font_01_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 11756 bytes
SHA-256: e1d9da36f03e3eb0e9e3b3da2c05f93b292a063a3c9c4250ba9e926886b28b0f

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