MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains references to 'answer key' and 'wkhtmltopdf', indicating a lure to a website. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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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://jottigo.ru/wix?keyword=what%2527s+in+a+leaf+answer+key PDF link annotation
- http://taxevidel.medianewsonline.com/1309156248.pdfIn PDF document text
- https://cdn.sqhk.co/jakufomego/fhgghDc/sticker_maker_for_whatsapp_apk_free_download.pdfIn PDF document text
- http://tonedomopoja.scienceontheweb.net/en_la_tabla_periodica_cuantos_grupos_y_periodos_hay.pdfIn PDF document text
- http://davebamonuzove.medianewsonline.com/16274459440.pdfIn PDF document text
- https://cdn.sqhk.co/putomikoluku/girjbrL/gupofobuludonefewamosopug.pdfIn PDF document text
- https://cdn.sqhk.co/lexikegije/ifjaiie/merchant_of_venice_full_text_with_translation.pdfIn PDF document text
- http://japadalifu.22web.org/tamilrockers_tamil_2017_movies_full_movie.pdfIn PDF document text
- https://cdn.sqhk.co/tudobele/7ygfhty/28953693183.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/ec60f7a1-cc27-4ffe-994a-27b878c9e8d5/45523007239.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/956db440-1ade-45a2-ad67-28484a9719d1/logabi.pdfIn PDF document text
- http://nepogewapiw.epizy.com/starcraft_2_free_to_play_vs_paid.pdfIn PDF document text
- http://mifabusageruf.rf.gd/black_seed_oil_side_effects.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/474865eb-9743-4cbe-a7b0-7e820098225e/usmle_step_1_fee_for_img.pdfIn PDF document text
- http://rixibedi.onlinewebshop.net/how_much_horsepower_does_a_2012_jeep_grand_cherokee_srt8_have.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/03acea18-58cc-4261-bb8e-c5c1aacb76bd/jebaluxu.pdfIn PDF document text
- https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_a76cea908284447e9c2e4f9cb24e7d8e.pdf?index=trueIn PDF document text
- https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_59b1614c0e744704a63ddc824f446fb1.pdf?index=trueIn PDF document text
- http://wupatime.epizy.com/jaxiwisa.pdfIn PDF document text
- http://rabatelekovufar.myartsonline.com/starbucks_coffee_liqueur_nutritional_information.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c902.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC902 | 5160 bytes |
SHA-256: 9efb750049001a290956276259a55c84ec08172adf2e7ff7e7116c5cf9bb8e1a |
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font_01_sfnt_off0000da6b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDA6B | 6168 bytes |
SHA-256: 51f26cee5ad250be6b0238dafe99199974925ee943fc9423ca076f2eeab24592 |
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font_02_sfnt_off0000e956.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE956 | 10120 bytes |
SHA-256: b5de6f5ee3d0236e9f57c9e522fa0293e76b80dd1e57daea9b68e4692366b2dd |
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