Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14583782af8d74d…

MALICIOUS

PDF

83.1 KB Created: 2021-03-19 16:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 99a6aa77daeeaf860a0e084a063bef97 SHA-1: 2c19a8614b7b11223f719760fe3cac8c69454a9a SHA-256: d14583782af8d74da6a9aabcccac09aa2798afdf8779396474692b9fa25bb932
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or spamming campaign. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of external URIs and a link farm pattern. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/award?keyword=como+aprender+a+dibujar+manga+pdf PDF link annotation
    • http://cancandance.org/demography_and_social_statisticss50sd.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/bNjijge/wikiwalagafowagor.pdfIn PDF document text
    • http://yourbigdick.space/samujutemavogemari18j72.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/36897461893.pdfIn PDF document text
    • http://jokegave.mywebcommunity.org/dogelad.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/jgBgcgf/25104224332.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jd4jggg/business_support_officer_jobs_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_601052e378b10.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/iT95gjo/60238099751.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/gjbHPDK/fipok.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/oxford_thesaurus_download.pdfIn PDF document text
    • http://winwites.space/79696535943wswcl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_6048dcbd95c63.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/IheThif/z_nation_cast_season_2_episode_11.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/94icjcA/8867035559.pdfIn PDF document text
    • http://vermono.site/space_shooter_galaxy_war_attacksc0vge.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/b5aa334e-6d72-4470-9bde-0e3dd2cf5325/how_can_i_play_a_mini_dv_tape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232e0aa0-d8a3-4822-85c8-a1d7e1f6a748/longman_pronunciation_dictionary_for_upper_intermediate_advanced_learners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61701ac2-662c-45ee-b6c3-020b2c7de6b8/35230099315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ba16df-57a1-44d6-b6fc-9b9a2db5ead2/how_do_you_use_a_precision_cooker.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/45113144069.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/affairscloud_august_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 5272 bytes
SHA-256: a903ee6f05f4f946f7c6a528719caf7d14325c5b52fc1f1af0fbb913052834a3
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off00011545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11545 12260 bytes
SHA-256: 7efe35a3f48fa522657ebf55c7c69e2a384f310234dc9b3c2559a06abbf9e301

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