Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a5dfe7afd7e2f4…

MALICIOUS

PDF

81.2 KB Created: 2021-03-11 04:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fdd902ec5cc380715cd8a142b52e1a8c SHA-1: cd0ceaf51a6f391d8dc297b2d9b4acfe6f59f59f SHA-256: 44a5dfe7afd7e2f43346f83a42129caf8554ffe46a0b9b642b1812d9d031877d
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically referencing 'import csv file to excel template' and directing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=import+csv+file+to+excel+template PDF link annotation
    • http://gizigevom.mygamesonline.org/tasekemozalabobakezofin.pdfIn PDF document text
    • https://rivelipa.weebly.com/uploads/1/3/5/3/135349188/soruzev-lutabawim-fiwobosur.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/how_long_for_capped_brood_to_hatch.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/taresesejusedivanofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_601d5246499d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_60466e84751f1.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/587fd00e872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_601b656d9a7ae.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/fukezavazuj/metal_gear_solid_3_online_2020.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_a42a0ecbdda947309fd2bae30cf05156.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_2bc0d5aab39b4f4e96775fef690a4858.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/pearson_correlation_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b284f689-d105-43c3-8051-f4ebf4a8a67d/93778631826.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/60787519700.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_ee58c74d70af481a92ae0d65433e765a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ced170-eaed-413a-8bd7-01cbfb59ea25/what_are_the_components_of_a_functional_assessment_why_is_this_important_for_this_patient.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_7fe3adf9f45642e7aead2141eef0b833.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a05c55-4634-4c18-a457-da564fdd7104/samsung_ce0168_tablet_full_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/webewebifejuwozonugutifif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132d660d-0372-45ce-bf51-65b57b182a68/90779289083.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/60666590798.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_4b989afb919241ed8e861b4e98644b70.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_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 5228 bytes
SHA-256: 22bf8d09ce3ed38a416402643f304a13b28abfefc22191ab278f6fa01e93b04b
font_01_sfnt_off0001117b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 11044 bytes
SHA-256: f11c9a770a89958b6c8e0798105d1f6130264a3d6d548e56192ce0fda2d294be