Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fec5d7d53e1511…

MALICIOUS

PDF

37.6 KB Created: 2020-10-17 11:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b9c7d238bda72109bb9d4782efbf0476 SHA-1: dfd55130614038b03a4c92246328423b80bbb0d1 SHA-256: 90fec5d7d53e1511daa687843054c4e3ae9f2dcc0f2e3459df054d4e0017f2f8
154 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to a known malicious domain, likely intended to trick users into downloading malware or visiting a phishing site. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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=wad+download+games In PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/fubakuv_fezuronuvipi_nuneki.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/2175801.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/pejixijesoba.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.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/9ba54571-e5c0-4d0c-87e7-3108dd2cfb73/nurilebuzetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af627ae2-49c6-47ef-a99c-25c0c962d2be/kuran_kerim_indir_mp3_cr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fb3174-b3c2-488d-a1f0-35c64fea9185/chamberlain_940d_01.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583d1a3b-78e0-4def-ba6c-57ba8dcd4d32/tuvuradamomovozikasorov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8554b864-47a6-446c-94b3-7b42f081fd5c/duzetotaselebefaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97f08d0-48ad-4095-9466-9cf8890a0951/4672406607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830656df-a4f8-460a-8736-1fb2a95b0d86/mugofokulavekojirub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71a81a3-4ab5-4ce3-aebb-76409f1e6454/sijizajumagarof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2494f2-7bc3-4724-957f-334141d1b412/9708770080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166b7165-96c4-41e3-88d2-430569ceaadb/wefaxodiferikeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95527848-c2f6-4bb5-af84-1e6956c87a03/vunoduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d0a383-e32f-4719-9692-73b340536652/52203257456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb93e61-1f8a-4319-9ca9-43ae6f958313/nepasumow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9fb190-d4bf-4102-a602-9eb282361739/natugojojagevetexuwena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039aed13-b491-48ab-8268-2e33a91a4459/57879595337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79524f3-67be-4297-b30f-676fce283eef/bbw_weight_gain_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d64f766-b8b9-4ae9-9589-97d74e6486a9/55475944698.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_off00005575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5575 5152 bytes
SHA-256: 6ba0ef8f47818273dfbff42070fbd59c802669d93dc367bd058467a38c9a07be
font_01_sfnt_off00006706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 9968 bytes
SHA-256: de482f586fc5e0e38abb9298442c3ff2de9029fd625b51492f9b9d5d3bc6095c

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