Malicious PDF — malware analysis report

Static analysis result for SHA-256 7103d16c4c15fcaa…

MALICIOUS

PDF

110.3 KB Created: 2020-12-25 02:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b4d6d8efb635e3e031fd3167dadcb021 SHA-1: a572995f6dc0e56dfd6815443bffe929806353a6 SHA-256: 7103d16c4c15fcaab32dd131b510609b5e219f9d86ecc1ec4373486df97464dc
162 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a link to a known malicious redirector infrastructure, suggesting it's used for phishing or malware distribution. The heuristic 'SE_INVOICE_LURE' further supports the phishing pretext by indicating the document contains invoice or payment language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/square?utm_term=cultist+simulator+apostle+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f91cfcd30c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8f2a324791c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5fa489cedd884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f9097555981d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366365/normal_5fccd10a605e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8f4a6966914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fceccea5d419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5fa97ba4e12bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5fd959f8d9a34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fb8444-6ebb-4f3d-bf60-de76ce338712/41025110606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74ad921-52ea-4c80-ada3-ffa843562bcf/nenalowofadiriworufo.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/43733765496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54dc625f-5dd2-4d9a-a960-6691734173cb/how_to_set_music_equalizer_on_iphone_6.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_off00017429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17429 5184 bytes
SHA-256: a08f6f5836dc007ce0371c73a2a0fa6788f91be0cfc23ba0a6e5dd78eb0c68a7
font_01_sfnt_off000185a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185A8 11500 bytes
SHA-256: 2016ad991f5564b5111bf7c30fdc1ad7b3fd75ff8c56bc4b54b476b9d8e99c72

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