Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fd6d92230f7dfc…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 17:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec407c2c552044ef774b98980b5aa559 SHA-1: 572443b284943466d6e94394c80e0e4dbef31a0b SHA-256: 96fd6d92230f7dfc11755e565d112b1cfeb80f4f6ff0bc13ae05c9d382fd47c8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=the+columbian+exchange+definition
    • https://juviroxekeko.weebly.com/uploads/1/3/5/3/135399696/xudiki_patatitok_setewopa.pdf
    • http://investmag.org/segumiviwpvrb.pdf
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/76dd569e16e.pdf
    • http://normaa-id.com/simple_subtraction_worksheets_for_grade_3ve3me.pdf
    • https://cdn.sqhk.co/kagelemovo/cQghBhd/sulopaxa.pdf
    • http://pl50off.info/what_is_the_study_of_the_flow_and_transformation_of_energy0vgqn.pdf
    • http://it50disconto.info/dawefitapesalg83e7.pdf
    • https://cdn.sqhk.co/fonizijodi/maohhji/84179587204.pdf
    • https://cdn.sqhk.co/kinibemazoz/dBFhcgj/stay_alert_military_caffeine_energy_gum.pdf
    • https://zafatuxowusetex.weebly.com/uploads/1/3/0/7/130739053/geraza-bufolop.pdf
    • http://onsideball.info/besajowezebije8ks51.pdf
    • https://cdn.sqhk.co/ponesigis/2f7p9ij/azariah_kyras_speech.pdf
    • https://cdn.sqhk.co/migixurej/NVPhj6L/16466418117.pdf
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/3208388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://budakokubogomax.rf.gd/xemejepireluzisuma.pdf
    • https://uploads.strikinglycdn.com/files/e4409b44-9dc4-4e20-9b6d-3057ea09a65c/35838906139.pdf
    • https://uploads.strikinglycdn.com/files/75172441-c9d5-414d-bec1-34c1b94c60f6/what_year_did_the_first_harry_potter_book_published.pdf
    • https://uploads.strikinglycdn.com/files/e6117c4b-220e-4618-8049-3c6e0db389a8/40974143477.pdf
    • https://uploads.strikinglycdn.com/files/56b21c66-4cba-4314-94fa-044947f77acf/56082629224.pdf
    • https://uploads.strikinglycdn.com/files/35a5c895-8374-42e0-a2b3-a5ed429431fb/social_justice_questions_for_elementary_students.pdf
    • https://uploads.strikinglycdn.com/files/b7879622-4b86-49a5-bd6d-bc07e8e7a729/sat_practice_essay_4_examples.pdf
    • http://forawoxo.epizy.com/lirupuzijonopufopuxopugu.pdf
    • https://uploads.strikinglycdn.com/files/6deb76e4-ba1c-4a34-8463-08d05fbe64e2/dowoziwusixovajamari.pdf
    • https://uploads.strikinglycdn.com/files/5a72c0b7-15c2-408f-8967-3dd487d7cce0/how_many_calories_are_in_a_medium_popcorn_chicken_from_sonic.pdf
    • http://wexereza.rf.gd/singapore_certificate_of_clearance_fingerprint_form.pdf
    • https://uploads.strikinglycdn.com/files/32d45557-c20e-4264-a2db-d8a23a30149f/6055593413.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fabf.bin
2b10e8a635b8754fc0bb16353aaceb49be9df48f6a83ae33010dc1131bb6acf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABF 5320 bytes
font_01_sfnt_off00010cb9.bin
fda65fca2a74eeed6562edbfed691a4d5c699195c3ff39a44a4d376d94a957de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 10848 bytes

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