MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for a 'biochemistry book pdf download'. The presence of multiple disposable hosting links and a high ML classifier score further support malicious intent. The primary attack vector is likely spearphishing, leading to exploitation via a malicious link.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 5
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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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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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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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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://yafferge.ru/award?keyword=biochemistry+book+pdf+download In PDF document text
- http://wivevemeb.scienceontheweb.net/jofedadisixafatuzarukox.pdfIn PDF document text
- http://interbankdigital.com/kudaxedewatogidininatetel041y4.pdfIn PDF document text
- http://carbags.site/8137682774p3rlm.pdfIn PDF document text
- https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/4969868.pdfIn PDF document text
- http://investmag.org/rufometokbsov.pdfIn PDF document text
- http://segwaywheelchair.ru/vizisazipovipizafigaj0q61.pdfIn PDF document text
- http://prizinsta24.online/nibukereladizufififafagamyt9iw.pdfIn PDF document text
- http://novijixonusasu.mywebcommunity.org/hcu_adalah.pdfIn PDF document text
- http://watogoda.mypressonline.com/photoshop_cs2_training_videos_free_download.pdfIn PDF document text
- https://pejudipevunasu.weebly.com/uploads/1/3/5/3/135351173/fidivijitugude_linevene_merudolake_patogixavupon.pdfIn PDF document text
- https://gileledera.weebly.com/uploads/1/3/0/8/130874536/7811382.pdfIn PDF document text
- https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/muxekepidat.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/rimejiguvif/19008171547.pdfIn PDF document text
- https://s3.amazonaws.com/sugosubexez/vebodijaluju.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/32f958f2-91eb-4e5b-a777-388bb80fbf3a/96007160237.pdfIn PDF document text
- https://s3.amazonaws.com/dobikasukavu/char-broil_red_grill_what_is_the_chain_for.pdfIn PDF document text
- https://s3.amazonaws.com/xisefowu/how_to_design_a_functional_training_program.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/35d4026c-b7b9-49d5-8d47-24e9fdedf2fb/82037937558.pdfIn PDF document text
- https://s3.amazonaws.com/kefiperizonofu/45569515787.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5be031fd-c569-41c4-a69b-d9f7b90f6cb4/argumentative_essay_topics_for_class_10_icse.pdfIn PDF document text
- https://s3.amazonaws.com/zuwosil/playpark_audition_ph.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f2a2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2A2 | 5844 bytes |
SHA-256: 37c3ac2ead5c3ac6e634a4a046902598b8993083a05f859f2d1c7e7d70a3cd11 |
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font_01_sfnt_off00010674.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10674 | 10740 bytes |
SHA-256: 0c4af2806cc9b0ebfea3dd412b8995ca8db99fcee3d1d40a68bde16926d76e2a |
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font_02_sfnt_off00012b62.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B62 | 18804 bytes |
SHA-256: 59c17d39a1f81b5d1d2bf85db25734b82112008a44511b5a4d2743e21f8f1e8b |
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