Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52802021137c76d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 22:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6169a2da0ad6b278f5e1327ec16283af SHA-1: 5127159297e92021adc25af3d834c16f0f942354 SHA-256: d52802021137c76d476ef9ba5a35ffabf5e25133b8ffaf87ed2c8c4f15b4c69c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or free hosting services, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=manual+boss+gt+100+portugues+download
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/dijeniniduta.pdf
    • https://kibimibenafozo.weebly.com/uploads/1/3/5/9/135979164/wanapunik_tagipojevibemok.pdf
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/291a34c2ece.pdf
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/b2a7f35.pdf
    • http://femesugubu.iblogger.org/how_to_video_call_with_amazon_echo_show_5.pdf
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/ziponazunedujuxofege.pdf
    • https://bumitulag.weebly.com/uploads/1/3/2/6/132681993/b005470327.pdf
    • http://kovuzaxaf.medianewsonline.com/challenging_math_word_problems_for_4th_graders.pdf
    • http://jadogaxarabu.mygamesonline.org/73368344847.pdf
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/bubup-weferuju-gorirapanesa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xisuferixap.epizy.com/novol.pdf
    • http://gukutimaguvuzum.onlinewebshop.net/nebijajonire.pdf
    • https://s3.amazonaws.com/sefepugolupalax/pikobasu.pdf
    • http://zobawukesilebaf.epizy.com/vlookup_different_sheet_name.pdf
    • http://xapitolo.rf.gd/how_to_make_a_green_christmas_tree_look_snowy.pdf
    • http://zeraginijumeje.epizy.com/atoms_and_molecules_notes.pdf
    • http://gemosufijubimup.epizy.com/lost_and_found_bluford_series.pdf
    • http://sorisavitekinuj.onlinewebshop.net/18276739129.pdf
    • https://s3.amazonaws.com/pewibim/apache_ranger_plugins.pdf
    • http://surobufalinaxis.epizy.com/the_catapult_2_mod_apk_latest_version.pdf
    • http://livasesokod.epizy.com/wixolilopos.pdf
    • http://podoremekuzepo.rf.gd/novevujokesosizuwonef.pdf
    • http://rupaxabo.rf.gd/73627989917.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece7.bin
25f0fc832c97c677ba520f37ac6301fd3cf33d5eb785a4299dd69830d802b0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 5556 bytes
font_01_sfnt_off0000fff2.bin
4ae6887f90fcd23db7e722b5b8265b4caca24d4dfdc779d17c04928b7e9e0e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 10660 bytes

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