Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12e1e2994c4bbf9…

MALICIOUS

PDF

70.8 KB Created: 2021-03-25 09:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dfddf8f1855fe76c17e63c2f1350792c SHA-1: db9b3f27edb70140d47200b8a37d062c3930faf7 SHA-256: b12e1e2994c4bbf946d10f28fe2f79f1edd4adb9bd1fea8352f4ced94fae8a0f
244 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a redirector link and a large link farm. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves leveraging a large number of external links, likely for SEO spam or to distribute further malicious content, and the ClamAV detection suggests it's a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=manual+instrucciones+mares+puck+pro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492257/normal_6019a213a4f05.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/fodibukobimiw-maxito-nurilufuxageli.pdfIn PDF document text
    • http://lowuwirakob.66ghz.com/graphite_gasket_material_sheet.pdfIn PDF document text
    • https://zixixowiw.weebly.com/uploads/1/3/4/6/134605173/1491604.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/pejodilipevulalumawejusi.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/40254738100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_600247ada40e1.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/351bc.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/the_body_book_roz_maclean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401517/normal_5ff27bbd61603.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/critical_history_of_western_philosophy_y_masih.pdfIn PDF document text
    • https://vugigedekamem.weebly.com/uploads/1/3/4/3/134339685/lajojuz-vebariw-bojurog-jorogotowaxud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_6040b2ae5c20d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijikudetixo.epizy.com/cateterismo_vesical_tecnica.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_0bc50ac272d54fd8b62203f1bf8d7722.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_76ca983c3f5848ea83f054fc86e182cc.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_70f1f4277e26484f8e8c94796944b4ce.pdf?index=trueIn PDF document text
    • http://juborekif.atwebpages.com/nyc_economic_development_corporation_salary.pdfIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_a005f4d342594b099e59946221a42467.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_75630bbaa82644c5a957d73660589b31.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_f8b912ebd181489b81982dabed2416ca.pdf?index=trueIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_1c1c10f55fc942ac9c91500f79c398c6.pdf?index=trueIn PDF document text
    • http://perajida.epizy.com/career_path_management.pdfIn PDF document text
    • http://goduziposu.rf.gd/how_to_apply_for_pa_snap_benefits.pdfIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_d6b6d5b82c04428cb65c14b6e0fe6127.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.

FilenameKindSourceSize
font_00_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 5148 bytes
SHA-256: 748e97bf27c494230de7399c3358648bbc13ca0de929b4ed5dd1b617f4c9db57
font_01_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 11628 bytes
SHA-256: 1a9d756cd50b7c653b19b5bc52d18ebf4a05f1f8b537665e5cae0f35ac57780b