Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dc2d452305b93a…

MALICIOUS

PDF

92.3 KB Created: 2021-01-13 08:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 84c8098ee8abb54c3eb804e9ce26c68d SHA-1: b57f87f8bebf0d952e6de60c615a82ef00d20a5c SHA-256: 97dc2d452305b93a3f7ba17fa0630f4c0adeef583ecb0d343df1a304486748ab
192 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a critical heuristic firing indicates it links to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL, which is likely used to lure victims to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://traffine.ru/123?utm_term=it+works+energy+drink+discontinued In PDF document text
    • https://site-1179698.mozfiles.com/files/1179698/crush_love_meter.pdfIn PDF document text
    • https://site-1178164.mozfiles.com/files/1178164/xalavafoviwijeb.pdfIn PDF document text
    • https://site-1168487.mozfiles.com/files/1168487/rare_beauty_foundation_swatches_230n.pdfIn PDF document text
    • https://site-1238560.mozfiles.com/files/1238560/fiwutenibigamu.pdfIn PDF document text
    • https://site-1171785.mozfiles.com/files/1171785/vedabo.pdfIn PDF document text
    • https://finubakexa.weebly.com/uploads/1/3/1/3/131383318/5439577.pdfIn PDF document text
    • https://site-1245969.mozfiles.com/files/1245969/arena_of_valor_android_play_store.pdfIn PDF document text
    • https://site-1168377.mozfiles.com/files/1168377/whatsapp_plus_4_apk_abo2sadam.pdfIn PDF document text
    • https://cdn.sqhk.co/zagusebipin/hdHUrLI/translate_spanish_into_french.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/fgjXghH/66301115295.pdfIn PDF document text
    • https://site-1179150.mozfiles.com/files/1179150/jorekesetokoselar.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/likerajatob/apc_netshelter_42u.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/banal_nationalism_michael_billig.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/lujidodaragisizinewa.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_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 5060 bytes
SHA-256: 6ae58a39112b70edee0833fd4d77acfa99c815fc1f63c2f48670b3cad836588b
font_01_sfnt_off00013c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 11668 bytes
SHA-256: 000b22de7005c18f8b9dc78910effd0db5061d3c34349eb5b56498ab55b3ee61

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