Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcec80b71388df81…

MALICIOUS

PDF

112.1 KB Created: 2021-04-18 11:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 121a69d5508ff2c4d74a1879e4b61b7c SHA-1: 52922f7ac54b24a40142fcf1095be5aa37a5a815 SHA-256: fcec80b71388df81a22b9ab5a12fb9de99cb7de09dbda3ddb7eb4c8cde7d9480
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the link farm heuristic strongly suggest an attempt to lure users to external resources, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=the+creative+spirit+an+introduction+to+theatre+5th+edition+pdf PDF link annotation
    • http://christinaanddavid2019.com/creader_professional_crp123_software_downloadqz3at.pdfIn PDF document text
    • http://sewaxatifa.iblogger.org/is_africa_the_origin_of_civilization.pdfIn PDF document text
    • http://phtech.site/40605914328eq65u.pdfIn PDF document text
    • http://wepufuni.iblogger.org/bgp_confederation_configuration_example_cisco.pdfIn PDF document text
    • http://trynutra.shop/dakokinifakq8g0h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_6069169b2fd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_606c4c374150f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_e9f97e91763a484a89090a66d73d71a9.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_1f5d9c596cd943cb8ed0526424b112ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/finite_element_analysis_book_by_j_n_reddy.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_2510f4ca82e343d3a33eea5323ccf9e0.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_8aedc043626f45c7b9714db4e02a599c.pdf?index=trueIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_00bccaca2166442cbb298e0fc645ff99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/eureka_multi_surface_bagless_vacuum_reviews.pdfIn PDF document text
    • http://radikabo.rf.gd/fevofarokitamazesitodasu.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_d2648c8b22004e69bace84af04b9832b.pdf?index=trueIn PDF document text
    • http://sogonuvusawi.epizy.com/hemophilia_in_the_royal_family_answers.pdfIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_6d07be43686b455480be063434b767f7.pdf?index=trueIn PDF document text
    • http://laneneloko.epizy.com/buku_akuntansi_manajemen_kamaruddin_ahmad.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/pamefaf.pdfIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_34e161a5bdf144d19f8a3b367bf322f4.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_360e3a70e984449ea1ef1e43da40faae.pdf?index=trueIn PDF document text
    • https://inspirasionedun.blogspot.com/?book=0767417038In 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_off0001782c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1782C 5344 bytes
SHA-256: e9245da473452bd528ea3175fc009370fdeaf7b26af9776f96f83841f82716e3
font_01_sfnt_off00018a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A60 11968 bytes
SHA-256: 2de30172519f0bf80e6c0d13a1e36008dd6934a943af41cb07790ada9a3b38d2

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