MALICIOUS
222
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The presence of urgency and invoice lures further supports a phishing or scamming attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 9
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument 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.
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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://dafemum.ru/strik?utm_term=barbri+mpre+questions+harder
- https://cdn-cms.f-static.net/uploads/4366324/normal_6065fa78a1871.pdf
- https://cdn-cms.f-static.net/uploads/4445544/normal_60184eccef5a4.pdf
- https://gogadumipoti.weebly.com/uploads/1/3/1/0/131070618/5842950.pdf
- http://sugameloxufe.mywebcommunity.org/nugomadawajimelad.pdf
- http://suziterunedoloj.sportsontheweb.net/asbaq_e_tareekh.pdf
- https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/7253927.pdf
- https://cdn.sqhk.co/jebozibiru/Xf0ibid/xorulidetes.pdf
- https://cdn.sqhk.co/wirumedaba/ftjKmhc/best_box_game_ps4_vr.pdf
- http://larijasetejupaz.mypressonline.com/ejercicios_de_movimiento_articular.pdf
- https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/wirisa.pdf
- https://puwiwasoz.weebly.com/uploads/1/3/2/6/132695956/1966690.pdf
- https://cdn-cms.f-static.net/uploads/4402712/normal_60243afaca610.pdf
- https://bufofeguwozeder.weebly.com/uploads/1/3/0/7/130775144/votojuvorobifuzij.pdf
- https://mofesotuju.weebly.com/uploads/1/3/4/7/134712265/dafar.pdf
- https://kobipisi.weebly.com/uploads/1/3/4/3/134312725/rafefib_viwezutefafub.pdf
- https://jumugegapu.weebly.com/uploads/1/3/0/8/130814907/vimil_bupuvopilarafib.pdf
- https://cdn.sqhk.co/gufojakig/nghlpii/zanufasum.pdf
- https://cdn.sqhk.co/denirinodo/hT5iicb/smash_it_up_badminton.pdf
- https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/3837404.pdf
- https://xikigojajutu.weebly.com/uploads/1/3/4/3/134385057/bevogoze.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gazijewevan/38635550352.pdf
- https://s3.amazonaws.com/napejaxosinages/xitunajuxelupazi.pdf
- https://s3.amazonaws.com/tikoweravisixu/speak_by_laurie_halse_anderson_online_book.pdf
- https://s3.amazonaws.com/bubeto/83128138230.pdf
- https://s3.amazonaws.com/runuzitexokol/play_games_free_bubble_shooter.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00010e92.binbcc1d5f7d5ae9fdd88a6b4ab8ad3d1a7c1f5b7ac47db6358d0fe6fa79f03573c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E92 | 5480 bytes |
font_01_sfnt_off000120fb.bine6fa547b1a44945f2bafb0e2f2b7174217760094efc6c326c8931676d8e0f794 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x120FB | 11768 bytes |
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