Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32d92161d836e11…

MALICIOUS

PDF

90.9 KB Created: 2021-03-16 15:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0625a4f79ded2a06b9b0e5879dabcb3e SHA-1: bfd59808038883c49341344a156c50984a96de7a SHA-256: f32d92161d836e1114883c1e7cba36cad25c2292fd3277a191611ecd7cd25d7f
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics indicating it's a malicious redirector and a link farm. One of the primary links directs to a known malicious domain, and the ClamAV detection further supports its malicious nature. The embedded content, though heavily obfuscated, contains a URL that aligns with the observed link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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/award?keyword=breadboard+tutorial+pdf In PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/pevasi.pdfIn PDF document text
    • https://gibekadizekuni.weebly.com/uploads/1/3/1/4/131452913/vusorepimiradiz-ruwovujibafofed.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/723791.pdfIn PDF document text
    • http://zilijakal.iblogger.org/punenisu.pdfIn PDF document text
    • https://fobinoxibenor.weebly.com/uploads/1/3/1/4/131437242/bebe1b13.pdfIn PDF document text
    • http://winoorama.space/whats_another_word_for_listeningxd8ho.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/320023.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/5062767.pdfIn PDF document text
    • https://warejavusa.weebly.com/uploads/1/3/4/0/134017768/5032816.pdfIn PDF document text
    • https://sadusobagobazep.weebly.com/uploads/1/3/0/7/130776682/221359105444.pdfIn PDF document text
    • https://kutumamam.weebly.com/uploads/1/3/4/8/134893394/35769.pdfIn PDF document text
    • http://sfr-webmail.com/porazelowexotaxejum4y9y8.pdfIn PDF document text
    • http://all-system7.club/bapudapafawopomosuroxi5zij.pdfIn PDF document text
    • https://risixugetiso.weebly.com/uploads/1/3/5/3/135317557/85209.pdfIn PDF document text
    • http://callup.today/zojirushi_bread_maker_bb_cec20_recipesza9nq.pdfIn PDF document text
    • http://vsspb.ru/simple_tai_chi_exercises_older_adultsnv13x.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/vufupu/88525750541.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_2c3488d7f6d94bd58dd31de10b864bfa.pdf?index=trueIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_7ba7f5ebf93c412586c5ba6867c429dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/blueprints_for_a_saas_sales_organization.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_b940b29c171344568e24383ca9d1f79c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebenok/mandalorian_yoda_meme_template.pdfIn PDF document text
    • http://kiwusegofavuto.rf.gd/weathering_and_erosion_worksheets_high_school.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_e00c7ccea25247c8ad255c489ea86fdb.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_bed9bb84f2d54aefb10deb78ba0893fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/nature_birds_sounds.pdfIn PDF document text
    • http://jitimixilu.epizy.com/everfi_module_5_answers_final_quiz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 5044 bytes
SHA-256: 100d7cd1fb7d63eaa97ad897e1fb9aeb479b1c92e928264f5ac645326a65ded8
font_01_sfnt_off0001388d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388D 10888 bytes
SHA-256: e8194fc21526d68e0ce4d024af606282166bdeaf6a46ef217fb9fa9aad50b137

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