Malicious PDF — malware analysis report

Static analysis result for SHA-256 196b5946c6ad008e…

MALICIOUS

PDF

74.2 KB Created: 2021-03-11 06:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46d732d729c4147f8cf5776941f6a053 SHA-1: 2c4549aec7d4ec59ef239f09f2847bf66257ca9f SHA-256: 196b5946c6ad008efde35f7e5fa41b06a1742a393ee3e08939bb7a42860273ea
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector pattern.

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
  • 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 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.
  • 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://yafferge.ru/award?keyword=algebraic+geometry+pdf+hartshorne In PDF document text
    • http://storezone.info/saints_row_gat_outta_hell_achievement_guide6pbao.pdfIn PDF document text
    • http://qiwi-wallet.online/karuppusamy_kuthagaitharar_songs_free_tamil7llg7.pdfIn PDF document text
    • http://arnautmebel.ru/fully_raw_diet_bookbszzk.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/alex_rider_season_2_episode_1.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/gosenazuvozarerewipu.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/11319398434.pdfIn PDF document text
    • http://fruit-ita.fun/522338976267ml68.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/accounting_information_system_manual.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/fonorebapiwuwedaruxilexug.pdfIn PDF document text
    • http://activa-fb.com/niferegotiximerijazunori0fxnj.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/macbeth_agustin_garcia_calvo.pdfIn PDF document text
    • http://flowerport.shop/11224590278qj6ba.pdfIn PDF document text
    • http://mx50off.info/runivozogiwufafaduxu2iugk.pdfIn PDF document text
    • http://oneitstore.pro/starbucks_barista_training_videosnnlxf.pdfIn PDF document text
    • http://prodson.space/how_to_describe_sunshinebeb0d.pdfIn PDF document text
    • http://shop-kid-toys.online/brihaspati_vrat_udyapan_vidhi_in_hindi0fevz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/pretty_little_liars_season_3_episode_12_summary.pdfIn PDF document text
    • http://vakisetituli.rf.gd/ropakex.pdfIn PDF document text
    • http://wuxuxumeso.rf.gd/fopisekiluvolemibixidinaf.pdfIn PDF document text
    • http://wepirizifomonij.epizy.com/2004_ford_explorer_transmission_rebuild_cost.pdfIn PDF document text
    • http://dudulexo.epizy.com/never_back_down_2008_movie_free.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_off0000e552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE552 5800 bytes
SHA-256: 9043e2a3bed143cae099b06d05f7127a3c703312aad3bbb59caa944aab2e984d
font_01_sfnt_off0000f8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EF 9972 bytes
SHA-256: 838c2161d0388d54f26770ca057fa30f276ae77f023123cf8e469d1df418da15

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