MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, with a prominent heuristic identifying it as a 'PDF_SEO_LINK_FARM' and a 'PDF_SEO_UTM_REDIRECTOR_LINK'. The primary malicious URL identified is 'https://pistant.ru/pbw?utm_term=does+usps+actually+check+media+mail', which appears to be a phishing redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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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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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://pistant.ru/pbw?utm_term=does+usps+actually+check+media+mail PDF link annotation
- https://cdn-cms.f-static.net/uploads/4500438/normal_5fd7d4eec7d47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475866/normal_6025bf1a13abc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392666/normal_6062a75d4764b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368474/normal_602f096e94dcb.pdfIn PDF document text
- https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/nuduwur.pdfIn PDF document text
- https://savapavazatu.weebly.com/uploads/1/3/4/6/134677348/5985174.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368492/normal_5fd281a30745d.pdfIn PDF document text
- https://lozexisivebuzon.weebly.com/uploads/1/3/4/7/134702594/ae93a34946e7e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367279/normal_603d899f1e48c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375342/normal_60682514e847c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417999/normal_6009f55305da5.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/146a397e-bfba-4c0c-a2dd-92c9e968e0ed/lochinvar_knight_boiler_troubleshooting.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7512990b-4306-4c03-bc70-a0665a98b797/how_do_you_load_a_swingline_staple_gun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27069c11-a2bf-46fa-af34-6c27bf106373/arris_tm822_online_light_blinking_amber.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dc21955f-9f86-4afa-8ca6-c4f4b8a051b7/what_happens_in_the_3_stages_of_mitosis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/23f6a874-b2ac-4a72-b017-816cf3d7620b/rider_waite_tarot_meanings_book.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/134d5729-9516-45c8-a959-f52f87e3310e/31000931898.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd721c04-e774-42a9-879e-5cac0c1fe9dc/78642617696.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/57237683-096b-46cf-b70c-6d77780d45a1/35049679364.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e47e13b-f7f1-413f-ae17-b4e4db28cee6/license_key_gta_5_download.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_off0000ddc6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDC6 | 5384 bytes |
SHA-256: 36e1e79d17e863afa3c6e6df1a2db93049a521e63a718c27abab69b0fffdd5ae |
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font_01_sfnt_off0000effd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFFD | 10084 bytes |
SHA-256: 8d80e0bd8b1742933c6ac24a5b25ffdca4728808ad2b038a8cfabe267f03ac5c |
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