Malicious PDF — malware analysis report

Static analysis result for SHA-256 343210cc5283fab5…

MALICIOUS

PDF

37.8 KB Created: 2020-11-04 17:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 42222bab596e2883d74ef47d565049aa SHA-1: 15651ee861570b7d03d98e68acf426280f19052f SHA-256: 343210cc5283fab529342fd95576e2fa65e5dc240262a3732f1b2258761acc3c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to improve search engine ranking for specific keywords, likely to mask the malicious intent. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=cablevision+remote+codes+for+samsung In PDF document text
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/nasejuwat.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/nagewo.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/11d11f84-9b22-4562-aa8d-097b66398def/waziwubevalitegakenoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b3fb7c-ecdb-4c22-bc99-a2a802d8345a/43519363775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d554de1-099e-46a4-a8df-bd1bfd9dbaef/antha_arabic_kadaloram_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d01a61d-47da-4391-8548-75781a3c5959/husqvarna_model_yth22v46_mower_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4de06a7-1a1c-4807-ae1a-bfb63ead9f14/rulugepazinuramu.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/tamibenixuzawagonatexaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de60d1ab-7688-49c8-b3fe-07f0b7b019c7/mulazuviwunovaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f588759-0277-4318-a60c-58ad93e9f4ee/kimiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6cba93-595f-45d7-96c8-9af061435886/poemas_de_natal_curtos_para_amigos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84056db8-d73b-4704-9e52-40850f0d16ae/ragebasedexi.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_off00005426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5426 5448 bytes
SHA-256: 1697b6eceff017e5e7af5e7e3743567e69c447436714a41e484a0fd583cf82b8
font_01_sfnt_off00006698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 10432 bytes
SHA-256: 8d3281d3f5e1f5914875cc07e4025ca8f975b379beba8873e3683d69864eb739

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