Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9dd34d5250611d…

MALICIOUS

PDF

59.5 KB Created: 2021-01-17 13:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8607e75b9d746a71a5f20389f8f3c50e SHA-1: 1c5f6c78bc7b6cef06ce86ddb9dff96e4cfb337a SHA-256: 7e9dd34d5250611dd98da0aec3eb42d7128ac8d8e5d1ebf2155d8ae6aacbf25b
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'weather report'. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://ggtraff.ru/aws?utm_term=weather+report+in+balbehra In PDF document text
    • http://jaraxusej.iblogger.org/52546385557.pdfIn PDF document text
    • https://xinelonaveguv.weebly.com/uploads/1/3/4/6/134606197/dipawamajufidiwedisu.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/jasovuned_wajomijim.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/fggyggB/wink_smart_home_uk.pdfIn PDF document text
    • https://site-1171394.mozfiles.com/files/1171394/sniper_3d_assassin_shoot_to_kill_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/jfWFAia/fifa_20_fut_team_maker.pdfIn PDF document text
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/94ace15d4c84fe4.pdfIn PDF document text
    • https://cdn.sqhk.co/lidabofob/EFgfibx/breyers_vanilla_bean_ice_cream_gluten_free.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/tifuwuw/manualidades_de_bruja_halloween.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/hotmail_email_sign_in_account.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/basf_se_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/bteb_admission_form.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_off0000b153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB153 4884 bytes
SHA-256: 4854ad10d9b6f68892229d69eb6b3ee80c20fe15d9e57070d92104bd6602613d
font_01_sfnt_off0000c1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F0 9172 bytes
SHA-256: 8885f7a7f074b61261a41651a62ad4782971da1e12b36fb08993aa7f4927de99

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