Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4f5c0d8a968ea8…

MALICIOUS

PDF

44.9 KB Created: 2020-10-27 00:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 29d3cb0a9c4db79f5c858b9e863aec2f SHA-1: 1912b84f5311e6d9ef582deb701a524881ebfc55 SHA-256: 1e4f5c0d8a968ea8171bf632480ae25d321d938b00c68ebf429d64b14583cdc8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the heuristics, suggesting a coordinated effort to lead users to potentially harmful content. No scripts were extracted, but the presence of many links points to a phishing or link-farming attack.

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://gettraff.ru/strik?keyword=personal+conduct+policy In PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/punadax-kazugokov.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/130c1.pdfIn PDF document text
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/8edd27f6.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/soberu.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/xazukaxodizowuwas.pdfIn PDF document text
    • https://galojegada.weebly.com/uploads/1/3/4/3/134364802/wutedupitasipema.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/7c1a893.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/sugaguxagu/html_code_to_nodejs.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/42442104772.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/eliogabalo_artaud.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/tactics_for_listening_third_edition_basic_pack_a.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/sugopedova.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/world_map_printable_with_country_names.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/ritivanisikumuloterul.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/list_of_oceans_of_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/binet_simon_intelligence_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/mebuvulobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b5b139-7093-4d6b-8b85-57bfe38e36a6/comic_fighters_3.4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db15385-c3d3-4e29-9edb-b680b37d9dbc/daburerimafujegopana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef096385-7dfe-421f-b93f-7833957a8750/22827090788.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_off00006f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F41 5172 bytes
SHA-256: 8639911be105fd904ec1689e618ab53807d4d28387b77ed02cfe098c708e8c2d
font_01_sfnt_off000080e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E6 11060 bytes
SHA-256: b2d363a69e973345264db07015840c228df70424062cd594498b871886fb10f9

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