Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b03f722b4eac37…

MALICIOUS

PDF

80.0 KB Created: 2021-02-04 09:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e8723593583ae98619426e3ade6d45ad SHA-1: eeeaf7a89a51002f949aedbbbfd39a2e6187df1e SHA-256: 11b03f722b4eac379a9f868863d7b82622e694787ab67fa2940340c5390387b6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated programmatically to obscure its true purpose and deliver malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=knife+price+guide PDF link annotation
    • http://optamorem.com/67351239959dtdst.pdfIn PDF document text
    • http://apsmall.space/mediamonkey_playlisten_mit_android_synchronisierenxm0xa.pdfIn PDF document text
    • http://damvglaz1.xyz/torrent_malayalam_movie_downloadsm8b0w.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/277896720.pdfIn PDF document text
    • http://streamsweets.com/482268921651wcat.pdfIn PDF document text
    • http://thelandofbadideas.com/66239409891ny69w.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/sugifotememeloj.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/lofedod_gazapi_jifujijizixesam_bedusikukuk.pdfIn PDF document text
    • http://lalashoppen.online/9647151174r023w.pdfIn PDF document text
    • http://hurricane1.space/kegivudonunixvn64p.pdfIn PDF document text
    • http://creditstar-kabinet.com/gukugovanixapezesegoghy1zk.pdfIn PDF document text
    • http://cardioactiveuficiale.site/vokogutufonaxetobamofudorlqbpn.pdfIn PDF document text
    • http://bit-ipo.ru/mattress_firm_adjustable_base_remote_instructionse7ymc.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/ruxedirusij.pdfIn PDF document text
    • http://totufozumad.iblogger.org/minecraft_free_unblocked_1._14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gatituz.rf.gd/cheran_pandiyan_movie_comedy_videos.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/zabuge.pdfIn PDF document text
    • http://safodur.epizy.com/22135929601.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/bejuvule.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 4564 bytes
SHA-256: 120d6c7ce6fe90d4cd144ec6fe14f413087889124d2d2740668eeb86e110d67e
font_01_sfnt_off0000f33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 10956 bytes
SHA-256: 88344f0dfcf00586a1c7977a8391520601cc4f833d47ba25ab2b187847c21727
font_03_sfnt_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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