Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc33d7a7f60f0c1…

MALICIOUS

PDF

130.3 KB Created: 2021-04-06 14:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 222877bae580b966e6b65da8d9cc20a8 SHA-1: 217d56f7d8832f82956cb3a1a251d435003bdf76 SHA-256: 4cc33d7a7f60f0c1fae15fc6c3f7b5b8150cfeb26128a38be4101cfe40cb2876
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within seemingly legitimate search results. The presence of embedded URLs suggests an attempt to redirect the user to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=aditya+hrudayam+stotram+pdf+in+gujarati PDF link annotation
    • https://bidopafogusiw.weebly.com/uploads/1/3/1/0/131070115/mepufunidami_pamutulinex.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/PshchfP/dining_table_set_ikea_au.pdfIn PDF document text
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/dujap-somaguleguf-korog-tavarumakugogu.pdfIn PDF document text
    • http://rorejidefozuroz.iblogger.org/2020_cadillac_xt4_owners_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5fdfafdd99f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_6052fa3d011b6.pdfIn PDF document text
    • http://fibaratibe.22web.org/muweboliwozotevixugotew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6010b376dc568.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://kipukosolenures.22web.org/convert_to_word_adobe_acrobat_reader.pdfIn PDF document text
    • https://foguvebosep.weebly.com/uploads/1/3/5/3/135315209/e43bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_6005d7d9bdd97.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/ejdigje/skyscraperpage_forum_san_diego.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://sofidusujewa.epizy.com/64298844374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ca366f-4d83-4ffb-a9bc-a9c6f0ec9dc4/did_neptune_have_a_son.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867649af-a7a5-4e9f-b53d-4da38d23c1e4/heal_your_body_reviews.pdfIn PDF document text
    • http://lotawovuvowuk.rf.gd/an_anthology_of_short_stories_icse.pdfIn PDF document text
    • http://vetavewolo.epizy.com/50968949169.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/volantino_esselunga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f39c59b-ed9c-4058-a58e-ef99a2679c94/gikoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355e6373-2679-41d5-b56f-6c7060f3aae8/80474969611.pdfIn PDF document text
    • http://sesilav.rf.gd/antibiotic_stewardship_guidelines_south_africa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001bce3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BCE3 20936 bytes
SHA-256: cb1ce9d8f6e3eb96a1933bd68aec687a5b70bdba007261401abd76f6b255658a
font_00_sfnt_off000164a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A2 5588 bytes
SHA-256: ae7f2ac7194cf90923ed02beb2c5c57cfec968900f2bf5366e4595d3f4b8bca1
font_01_sfnt_off00017789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17789 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000182ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182EA 4548 bytes
SHA-256: 9ed1320351536ae0f69eea331eda2b4db0184b64317657c05c7caf03a6ac1959
font_03_sfnt_off00019170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19170 13416 bytes
SHA-256: 4057de1a59122cfff8e1dac6de5f46d934abdf059355726b0d009ab53a58c610

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