Malicious PDF — malware analysis report

Static analysis result for SHA-256 1404fa37671cdd14…

MALICIOUS

PDF

83.2 KB Created: 2021-03-16 18:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a90d80c70d060b17f03ffaa556ebc20d SHA-1: d6ae3bcf2fec8a327d5d793d94be9ecb7c27da54 SHA-256: 1404fa37671cdd14063effd35adb9c5b6e0a46be3af7b7fedfbc2dfc3db0ddef
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous URLs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The 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.
  • Embedded URL info EMBEDDED_URL
    One 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://dugedepap.ru/award?keyword=business+law+book+pdf+for+b.+com PDF link annotation
    • http://newsportstechnology.ru/the_alienist_season_1_episode_synopsisoff7j.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/0f0ecb7a859e.pdfIn PDF document text
    • http://kersita.fun/mozetonigisararulageddru7.pdfIn PDF document text
    • http://kprovk.xyz/nivobapuxasetlsqi.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/xenaturexelomewo.pdfIn PDF document text
    • http://balifruit.com/comptia_cysa_study_guide_exam_cs0-001a017y.pdfIn PDF document text
    • http://mazers.fun/que_es_la_composicion_de_dos_funcionesyygni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_60348c792a3ff.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/wifanazumenod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_60103f54b964e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601de9b620156.pdfIn PDF document text
    • http://pestore.pro/kubenukagaminofa3kiol.pdfIn PDF document text
    • https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/5981660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_2a303e314dbb4b058bb759450a60be9c.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_4206d1a05f794ed4b896c91960346c45.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_c2084be92cb74a5eb76d2633829c1470.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d65ce4-d20c-4cbb-a8f0-24f1fade7936/7646892783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c1c272-2719-433c-9664-9c7e3aa468dc/39270013696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2614d62-c8a4-4734-ad28-6da794dad796/what_is_qms_subwoofer.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_335203eaa07541e88950eeb78858bc74.pdf?index=trueIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_87a8ebfe64924fa9b724f5651cd068c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af20e773-59f8-49ec-a684-ad244f3eab11/50385940309.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
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 6832 bytes
SHA-256: f6d8f0c111dd8b7acea4675c0ab710aee574dfbde482b739aef85f37a17f2c37
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 5676 bytes
SHA-256: b458373d036ebe101164aac9d1b57af7cb0b31d78d67a256735f436138a26181
font_02_sfnt_off00011632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11632 11520 bytes
SHA-256: f9a7d7ac4ae473b973d21c04687cde1081a9740a663ac0f2b91628fb9fc99f8f