Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec585c22e417293a…

MALICIOUS

PDF

88.2 KB Created: 2021-03-29 00:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aaecaf768786e058702d7b57c2969919 SHA-1: 0d6340f6c74239648b1512ba014a9027ae75974d SHA-256: ec585c22e417293ae2abedfaebcad90f5f32343ed426c287b2fc8c4cb926197b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and extensive external linking are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=salesforce+lightning+vs+classic+reports PDF link annotation
    • http://iclod.tech/honda_civic_5d_2007_service_manualh767k.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/1852454061.pdfIn PDF document text
    • http://tersq.space/asus_strix_b350-_f_gaming_manual5l34t.pdfIn PDF document text
    • http://wusator.mygamesonline.org/what_can_i_eat_on_the_advocare_10_day_cleanse.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/adobe_audition_cc_2020_tutorial.pdfIn PDF document text
    • http://mainsale.pro/the_thrill_of_the_chase_a_memoir_poem8ffkl.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/gekixadonuru/10853433737.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_afe7b55903ff493db7af5b12bb5996aa.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_68d7c98426b742549be0455b97f40c7b.pdf?index=trueIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_6191d918ab4a444daa89d8c51a26c1fe.pdf?index=trueIn PDF document text
    • https://e4c06157-4c4c-4c30-848d-1ce07482e123.filesusr.com/ugd/99e070_0c3a494b5f5e41b7bd800e06336e08f7.pdf?index=trueIn PDF document text
    • http://tarodemeja.rf.gd/anlage_av_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/6908336099.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_dcbed73ed77b4956a7d1038166532ddf.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_d1422e451718489ea402a8e662946959.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/fitisiwi.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/anatomie_systme_digestif.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/convert_adobe_to_microsoft_word_free.pdfIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_6bd2c7d06f08403ba6f6f979a9b08b01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/71220843562.pdfIn PDF document text
    • http://delifas.epizy.com/hack_driver_question_answer_class_10.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 5440 bytes
SHA-256: 4c2fc4f89781bd40065f094ce2ba0aed7efc0b8f5254ad2f0af9b36826c41551
font_01_sfnt_off00011679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 11440 bytes
SHA-256: e9baa3ab65b2b8f501fa2806f3d17a2140be4312c6e3ea7c9f8b61f30090ed01
font_02_sfnt_off00013d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4C 16320 bytes
SHA-256: c103817fc070fca9a9591fe9d66b30e7fada55352f065963be3f70cb6ab9e90c