Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d15c485798fb9ea…

MALICIOUS

PDF

40.2 KB Created: 2020-10-26 05:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6f2b318bfa9a8f203540d66963759492 SHA-1: 679d069bc2df0aa6469e1d68fca66b9f90e1a25b SHA-256: 9d15c485798fb9eac01ae50b827d07855301795ce0da44ab549b4bba5430c16d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that is likely part of a link farm or phishing campaign.

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://ttraff.com/pify?keyword=detection+theory+kay+pdf In PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/duzozasopi_jumojusoduti_roxazesof.pdfIn PDF document text
    • https://dazowuxope.weebly.com/uploads/1/3/4/3/134319454/4584852.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/zoramazoj.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/monogepilepu.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/demoj.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/resobexa.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/44a42da45d.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/lajoko.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/4599586.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.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/a940c7a6-536a-46d0-b2ab-f63f35a810ff/kasibenapobel.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/xeguveduw.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/spectroscopy_application.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/niluku.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/6865282557.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/ncc_c_certificate_exam_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/62319029997.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/caballo_de_troya_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/sakorivof.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_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5196 bytes
SHA-256: 2cc82c80e6d6bdc4efb59f2aa6b812f933afdc889932807e58abd4f978817ef5
font_01_sfnt_off000070c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 10232 bytes
SHA-256: c9132e20eff80bab976c069f4af1b49e3e0e7a4c0affb01a926bc598418899ad

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