MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links to external resources, many of which are SEO-optimized PDFs hosted on redirector domains. The primary redirector URL, 'https://yafferge.ru/strik?utm_term=english+language+grammar+lessons+pdf', suggests a lure to download educational materials, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 6
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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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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/strik?utm_term=english+language+grammar+lessons+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4421639/normal_603dba22bf4fd.pdfIn PDF document text
- https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/gatofi_pexaginotusasow_widebinulosu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483345/normal_604d21c23b618.pdfIn PDF document text
- https://fevokixesebu.weebly.com/uploads/1/3/0/7/130776230/2c20e4.pdfIn PDF document text
- https://banepopewux.weebly.com/uploads/1/3/4/2/134234854/f8ceac.pdfIn PDF document text
- https://suveruwifofe.weebly.com/uploads/1/3/1/3/131380558/liboredofolepol.pdfIn PDF document text
- https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/rusedikatupinara.pdfIn PDF document text
- https://wovovude.weebly.com/uploads/1/3/1/3/131397940/9195408.pdfIn PDF document text
- https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/e057bfc04d.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/mexesazaxasa/class_8_civics_chapter_3rd_question_answer.pdfIn PDF document text
- https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_4c708d87f6ec4bd29f3a4cefb204f6fe.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jevedijadiki/trigonometry_class_10_extra_questions_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/wexukufedepim/format_flash_drive_bootable_windows_7.pdfIn PDF document text
- https://s3.amazonaws.com/godoremitiwuja/getodapupifilorubomejuwu.pdfIn PDF document text
- http://forubav.rf.gd/imovie_storyboard_template_printable.pdfIn PDF document text
- https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_a47c990302044cb89735df08f91eae9f.pdf?index=trueIn PDF document text
- http://dejosabo.epizy.com/6186061642.pdfIn PDF document text
- https://s3.amazonaws.com/kavifunaruvi/zofepus.pdfIn PDF document text
- https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_a9ba1a367ad345708b32c468363cae0e.pdf?index=trueIn PDF document text
- https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_09e6372e2aa3455ca0b13d19470d0d55.pdf?index=trueIn PDF document text
- https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_78b17c3b4b9f4364ad1d6a4a0469830a.pdf?index=trueIn 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_off00010561.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10561 | 5412 bytes |
SHA-256: bba72aa399a1565cec48b1a66df4dda4254e87f468e0c091dfcf79be62bcfa2f |
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font_01_sfnt_off000117a2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x117A2 | 12400 bytes |
SHA-256: 7425a63c3982d0a8dc69c4cf688cf4cbab1776fdcda415afa12456fdbcc6e715 |
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