Malicious PDF — malware analysis report

Static analysis result for SHA-256 890556fc8ab5e789…

MALICIOUS

PDF

73.2 KB Created: 2020-12-25 13:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 114e462505a7cd6e38f29f0c2f56efb7 SHA-1: 3dae595fef09b91be8eb60de8080ff33f4f4c8ad SHA-256: 890556fc8ab5e789c62ab24c9a8777bb744bac43abd71047b0aa7f78adb4530b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains text related to games, likely a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=princess+dress+up+and+makeover+games In PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/nafelimenevumuxabod.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/tiwelo.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/igePRid/kixitida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sinadi/62339189309.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/nenda_usisahau_by_baraka_da_prince.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1607fbdc-98c6-4939-8007-4613b79df177/10919204048.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/dreamweaver_8_free_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5420ec8-2d7b-4c17-af6b-ca0caa217a96/59563632590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7375e896-5b0d-47c7-be76-3b2aa67bb7e1/wisidonometabax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b65de3-46f9-49fe-9e6a-e85205cbf6d6/rebatufovekid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83965dd-33bc-4341-9aba-de2987c1541d/84425267294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf12f81-47f6-4dbf-93d7-02680b53d9c4/toshiba_dvd_player_wont_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4728ef79-8021-43ec-9de9-029a4bd9ed5b/21259075229.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_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 5488 bytes
SHA-256: 1702157ccd53ca735b652ee81e0b1430bce54a0bcd2c56c46a8b2fac11f944a6
font_01_sfnt_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 10948 bytes
SHA-256: 8cc7353e78f15368395de5ee8a9b9053c6664fb88f7e604f1b8e4dc4952e8b3a

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