Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0190e8199fed42…

MALICIOUS

PDF

138.7 KB Created: 2020-10-09 03:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1c0f5e7316b15ac42e854a6371b38c61 SHA-1: 50f59a2d00decf5351b1a59422fc053cac2f08e3 SHA-256: ab0190e8199fed42d0362ac394bee892153618743dcb8303c6ecd114aa7db44d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external PDF files, forming a link farm, and one of these links redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=sony+a600+manual In PDF document text
    • https://site-1038334.mozfiles.com/files/1038334/35868397732.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/29042144295.pdfIn PDF document text
    • https://site-1038783.mozfiles.com/files/1038783/gegitufegenelatikexefebuv.pdfIn PDF document text
    • https://site-1042196.mozfiles.com/files/1042196/12177777054.pdfIn PDF document text
    • https://site-1043479.mozfiles.com/files/1043479/pakeliru.pdfIn PDF document text
    • http://luked.sebarms.com/uploads/1/3/2/7/132710621/kagade-betokatuti-vepudiri-pawakugobuzafi.pdfIn PDF document text
    • http://files.artistscollections.org/uploads/1/3/1/0/131071063/roverofaxepezadide.pdfIn PDF document text
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/0/7/130776314/8595320.pdfIn PDF document text
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdfIn PDF document text
    • http://rumanuwu.rarebreednationllc.org/uploads/1/3/0/7/130776418/3538432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/43451992966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8923/4594/files/the_christmas_gift_dvd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/fudugamimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9516/7654/files/mastering_biology_chapter_3_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2069/9813/files/41542173966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/old_blanchy_wowpedia.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_off0001dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCBF 5060 bytes
SHA-256: b13be5b38b1426969f10f239987dfd870fefde7054fb405c623223391d5c36ae
font_01_sfnt_off0001edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDEA 15136 bytes
SHA-256: 3b3cae11a7559580d982cfb7f0a0b0ec47b210956ea86abd9c6670879648b11d

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