Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a38035294207e9f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 21:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 01823515f64780e1b629e8b0961cf944 SHA-1: 472b603b50d5f505a366b2cc632b27e733b44ad2 SHA-256: 5a38035294207e9f38734bd19558035e6ae95dff8c2ea617c77c0854fbb4bbfe
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain associated with software cracks. Heuristics indicate this PDF is a link farm on disposable hosting and that security software disabling instructions are present. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://vilenefex.ru/award?keyword=autodwg+dwg+to+pdf+converter+pro+4.+31+crack PDF link annotation
    • http://jepenufi.getenjoyment.net/how_to_cook_beef_ribs_in_a_masterbuilt_electric_smoker.pdfIn PDF document text
    • http://sabaroxuxonefib.iblogger.org/29073164028.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/what_is_the_synopsis_of_romeo_and_juliet.pdfIn PDF document text
    • https://piwofenuxud.weebly.com/uploads/1/3/1/8/131871692/7935927.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/dunkin_donuts_protein_bowl_nutrition_facts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fd855527801d.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/mudale.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/31126367225.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/interpreting_and_analyzing_financial_statements_6th_edition_solutions.pdfIn PDF document text
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/9541140.pdfIn PDF document text
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/widapojure_kibunof_nibaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600dcd91116ad.pdfIn PDF document text
    • https://wodenawededun.weebly.com/uploads/1/3/5/3/135340020/xawalebupomix-kepedujuse-pojudanop-wasimagixagijo.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/dorulusof/povul.pdfIn PDF document text
    • http://bawalow.epizy.com/sibos.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/how_to_write_a_ap_synthesis_essay.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/do_lab_grown_diamonds_have_any_value.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bath_sheets_walmart_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/asamanya_balaya.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/sukugili.pdfIn PDF document text
    • http://rojomiv.rf.gd/samsung_camcorder_hmx_f80_review.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_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 5656 bytes
SHA-256: 0feb0a740a851defda42f15210f82343d76f10914841b3af646d5094069c30ab
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 11492 bytes
SHA-256: dcd7c486c2783db2570ed21486f2fdea368ab860c13767d96ed577ecd0fd3dd8

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