Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac0c615bb8b58b4…

MALICIOUS

PDF

65.7 KB Created: 2020-11-14 19:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 98190c2463aec6360618e5e955d22a69 SHA-1: c8e40906a2e41a4dbc2095fda9f729e6eb76a40b SHA-256: aac0c615bb8b58b4000ffb444a982552eccff9d82b173c0c477fe80f7f975c7d
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature by appearing as a product manual. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=samsung+microwave+manual+me20h705mss In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f9b2c62db353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465250/normal_5faaf46273a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fa6df17e93e5.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/kudefem/usa_kaspersky_kav_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b4fd9a-04a3-408a-a1b1-9747e43f6983/wanedurukidosakilojaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7040182-2eae-4802-a512-ef9d7e1a81a0/jadeburezababititi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f48bf9f-2ef2-48e6-8149-e78e226bfa5f/ruvunagofexumefome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a043085-45ff-42fd-abca-6102f00d4b3f/chevron_baby_blanket_knit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad41d883-487d-47bd-8fbb-403b7b87b429/que_es_geometria_plana_o_euclidiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a263f85c-269e-4f9c-b6f3-af3910a5964c/jbl_studio_590_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b515875e-0277-4e8e-980c-f983209d0ce2/68061376704.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/lakuseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e09b3a0-116f-449e-bfbf-e6fb1d0baa4f/harley_davidson_mini_bike_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d0fdaa-6188-44a4-8824-718effc31f9a/libro_excel_contable.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_off0000c0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F0 5948 bytes
SHA-256: 4725527cd4539305691bc7feb0c21f5a04c6073004ff6815e6e531823d147464
font_01_sfnt_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 10940 bytes
SHA-256: 1d746f2439ecbe9c45218ed613bed73844a2354ef333e6a316696830776b2afa

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