MALICIOUS
252
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links indicative of a link farm. The ML classifier also assigned a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'seasonal affective disorder dsm 5 pdf' and 'wkhtmltopdf', suggesting a lure to potentially malicious content disguised as a document. The presence of numerous links, some pointing to disposable hosting, reinforces the attack pattern of SEO manipulation or phishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 7
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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 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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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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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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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://crophysi.ru/award?keyword=seasonal+affective+disorder+dsm+5+pdf In PDF document text
- https://zimekepipo.weebly.com/uploads/1/3/5/3/135351260/fesepov.pdfIn PDF document text
- http://lorebip.22web.org/kinaluxejobebezitifemi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365662/normal_60248b6fd2cdc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404523/normal_60291f79e4484.pdfIn PDF document text
- http://xetumejowizaguk.22web.org/24035011389.pdfIn PDF document text
- https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/7c44b.pdfIn PDF document text
- https://jagavovukivotu.weebly.com/uploads/1/3/4/8/134881855/7371433.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://litipodetipuwi.epizy.com/qasidah_burdah_melayu.pdfIn PDF document text
- http://riwexakax.epizy.com/random_password_generator_excel.pdfIn PDF document text
- https://s3.amazonaws.com/tuzakifezara/zewosi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d3b650c-5ff3-4d16-b1fa-66bcd9110c3c/oracle_pl_sql_reference_guide_12c.pdfIn PDF document text
- http://jefofijoker.rf.gd/hint_test_score_sheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a5fa95c5-7e3a-446d-b21e-1fd19148be88/42211673333.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9209ed4a-bffa-41b5-a636-b97d13eca690/83416188852.pdfIn PDF document text
- http://gaditimotef.rf.gd/43438023740.pdfIn PDF document text
- https://s3.amazonaws.com/ziwuvijevo/pezoxujulivozedifezux.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/276c4ee6-d67a-4d83-81b5-585e996027c6/84746984789.pdfIn PDF document text
- http://zifofupox.rf.gd/vavasanox.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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00017c40.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17C40 | 5588 bytes |
SHA-256: 73e83f5711b7ec5c68b6e4d37f61ff2710c381809a97afb8865a9813b23ac80d |
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font_01_sfnt_off00018f33.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x18F33 | 10796 bytes |
SHA-256: 88dce86cbc95a95344d0ffd414e42509674dd7b6c00de4a932253e8241b6af67 |
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