Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed4e532c0746bc9…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 14:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dcde421add27340cdfd3fbd167e85e95 SHA-1: 474f7b290d11ae51c773cab0ca403748881b1911 SHA-256: 2ed4e532c0746bc9a6dfe42684cfed943b7a125fec37ad982329c2157ca4e1b8
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the presence of numerous links and the critical heuristic firings point to a spearphishing attachment attack 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://crophysi.ru/strik?utm_term=britax+advocate+clicktight+weight+limit In PDF document text
    • http://triple-doska1.club/factorio_guide_layoutscc60.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/ruziwufijox.pdfIn PDF document text
    • http://msertis.xyz/batigopukubufomuviwetogitz87t2.pdfIn PDF document text
    • http://item-mask.top/amplificador_qsc_rmx_850_precio3vp81.pdfIn PDF document text
    • http://myimperfectmomlife.com/17781223951jn2ds.pdfIn PDF document text
    • http://clebohets.xyz/what_is_daughter_in_spanishfe8jw.pdfIn PDF document text
    • http://thedouche.xyz/diarios_de_motocicleta_pelicula_completa_onlinedpq1g.pdfIn PDF document text
    • http://befigter.xyz/keteganurerapuwidkflp7.pdfIn PDF document text
    • http://carbackseat.site/oster_roaster_oven_cookbookd3ygt.pdfIn PDF document text
    • http://instapriz365.site/61699508446s7rpv.pdfIn PDF document text
    • http://graatorama.fun/death_school_pet_wizard101iytk1.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/babagokigeriv_nemubejo.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/nimakilotemije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_e3a84c4354bf4c5b844bc3da6059f04a.pdf?index=trueIn PDF document text
    • http://vusoxererereli.epizy.com/backup_exec_20._4.pdfIn PDF document text
    • http://gigogapa.epizy.com/26030364722.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/addictive_drums_free_full_version.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_0937a743089345da8138549157d3dd1b.pdf?index=trueIn PDF document text
    • https://2ee27f84-59db-4a9f-8bb1-9a3e044d6d07.filesusr.com/ugd/bca722_b3e88e9abbdf415c9f4c458bf05314f3.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_f031888c5f4844f99b2bc63d206794e4.pdf?index=trueIn PDF document text
    • http://jiwodiw.myartsonline.com/wernicke_s_encephalopathy_treatment.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 5508 bytes
SHA-256: 6710d95a8409214cb1ce6262515f79a5a744bdfdf8a93e2797fc90f5d879120a
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 10264 bytes
SHA-256: 836e69fe5af01fc1198e087f5efca1f43aae80bcb8c68afcc13aca8273fd37f8
font_02_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 16076 bytes
SHA-256: ceb30e69b2a1d6501fe8904d8a8466471eaa529f0958da5583c6585f97c9fab1

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