Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ffdbc41bfcb74b…

MALICIOUS

PDF

77.7 KB Created: 2021-04-03 07:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a144296e2b47aa7dd5fdf29e1e107bd7 SHA-1: a9b50bcebcc24f18884da34312713f09e57ae671 SHA-256: 36ffdbc41bfcb74ba75559eb6d650502a368086d97ad7c1833e056261afa9c18
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong intent to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/wix?keyword=weider+total+gym+exercise+chart+pdf In PDF document text
    • https://cdn.sqhk.co/kawaniroti/hFlAmWK/smash_it_breakroom_denver_co.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/jjjXwl7/animal_runner_in_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/gjgjhhf/kick_the_buddy_mod_free_shopping.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/jibjfij/lost_frontier_hemphill_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/jchidjj/motor_sims_2_downloads_folder.pdfIn PDF document text
    • http://fishland.store/free_online_dnd_map_makeriufcw.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/igfYVhh/25556075427.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/hfG7zgd/cartoon_movie_full_free.pdfIn PDF document text
    • http://hookup157.online/sisaxnihsv.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/pizosovexigajaj_lakusul_bivukepudo_vebefivivug.pdfIn PDF document text
    • https://walotowujiko.weebly.com/uploads/1/3/4/5/134582573/7709650.pdfIn PDF document text
    • https://cdn.sqhk.co/dowivita/ahf2Fha/boliw.pdfIn PDF document text
    • http://italia-doc.fun/sherlock_holmes_2_telugu_dubbed_movie_downloadl7lyo.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/lakadutof/pillow_thoughts_courtney_peppernell_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/2335587691.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dubiwupovosepogorujewula.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/dd_3.5_epic_cleric_feats.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/age_my_face_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/ganpati_aarti_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/minn_kota_powerdrive_55_lb_i-pilot.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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 5752 bytes
SHA-256: 8189e306952559aab2ebeb5bf9f9df7c27901e48c81cf6e82d9b445ba4401131
font_01_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 10832 bytes
SHA-256: ee6ecf566ca2332011c6afb39d4c2f904548fbc4f8c814f52da622a71d984e5f

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