Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f7b1c49c3a79df…

MALICIOUS

PDF

73.4 KB Created: 2020-12-15 23:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6922cb44ed6d215339e8bd69c3ab30a6 SHA-1: 181677be2ae137dcd574d7f80f0ba9771f35fb02 SHA-256: 90f7b1c49c3a79dfba06e3b588d41de51d7de226b21269e486f356169160e571
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged the file as malicious. The embedded URL, https://cctraff.ru/strik?utm_term=recep+ivedik+6+nerede+%25C3%25A7ekildi, is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://cctraff.ru/strik?utm_term=recep+ivedik+6+nerede+%25C3%25A7ekildi In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e4022637-a341-4fd1-9624-17d6d187a46e/ditezesivuzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a0ff44-12ce-42e7-9da2-8a5576a779c0/xatozomujojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faba9a0d-61a7-4d73-a6c9-118e30749158/fadiliginipet.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/siguluvirolirekofotojir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b9e0d9-cf10-4617-a158-6c8e6c894e37/zewomadefotinabewewam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc95d0de-5f7a-421c-81d0-f9480d4b37b6/gifikarupulajetoserowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7e1e95-1412-4b1f-933e-d788f12011b4/27770371585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40162786-7771-4146-989e-edbe7666e05b/vagejadipuwelokuzojom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cd11239b07229130be96/t/5fd1b5d7b1f692677156048b/1607579098420/anger_of_stick_4_mod_apk_an1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe7d1fa-c750-4230-a694-3029d3b3bf91/gatawebuxusamegadir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c0a4a13a450bab15ac41/t/5fcf2c2c1b45e152edc1f34c/1607412780905/ancient_empires_reloaded_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9152b91d-987c-45d7-b43b-a4646e867e9c/summersville_school_district_mt_vernon_il.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee313ba-97c2-48d6-af97-a8376107f0e0/59326087791.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 4744 bytes
SHA-256: 2923e55e2b5685c5f3853ab30e4f5866c84f75c7de243423109371e0b78b9420
font_01_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 11948 bytes
SHA-256: 27be053cd7ee62ce3b5776e15231a8a455c3bf0704f48391062f0b29ef4df4d8
font_02_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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