Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6303086f1c51d89…

MALICIOUS

PDF

87.6 KB Created: 2021-04-03 12:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 665075ff8fc2fc6ca0a10387d74baca5 SHA-1: 5be26417223cb6c680cd132057c0313be48ab843 SHA-256: d6303086f1c51d89e0f130e33b2944194f1b016fd2a0d462743f9e2025dfdef5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document that contains an embedded URL pointing to a resource that is likely malicious, as indicated by the ClamAV detection and ML classifier. The document body, though heavily obfuscated, suggests a lure related to a syllabus, which is a common tactic for phishing or malware delivery. The presence of multiple external URLs further supports the malicious intent of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://jacksth.ru/123?utm_term=ggsipu+b.+ed+syllabus+2017+pdf PDF link annotation
    • https://cdn.sqhk.co/josipinu/ifKjbiq/bride_and_groom_perfect_wedding_cake_topper.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/KhjgdGR/53343127323.pdfIn PDF document text
    • https://cdn.sqhk.co/dosapupa/77Gie35/likee_login_with_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/Xhetnhd/zidodekukekap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450728/normal_5fe1989bcd06d.pdfIn PDF document text
    • https://cdn.sqhk.co/worijekegir/ejcj3jd/frp_bypass_apk_for_huawei_y3.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/dJS6hid/santorini_greece_hotels_with_private_pool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_6051832606aae.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/ghaYgge/pirokixakumoberu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fce36fed31e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_60418f2d0ee18.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/cCiefgj/72823745493.pdfIn PDF document text
    • http://tempuri.org/tempuri.htmlBCAIn PDF document text
    • http://tempuri.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kofabube/xunozezukonegogebaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0470eb-1244-4708-96cf-f15d70d912cf/96363046858.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/posthuman_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/human_trafficking_movies_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466e3bf8-345d-44d4-b03d-722c52bbcfaa/how_many_cubic_feet_is_kenmore_90_series_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5806641b-f3e1-4a51-953d-dcf5c4eeca36/somewhere_over_the_rainbow_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c415df-c92d-4a8e-b3c3-74e28d47ff36/pelip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96079826-8a59-4930-983c-33772787ccfd/the_warriors_sol_yurick_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d908dcb-afc4-4aab-9d52-4482c7b7c5de/how_to_calculate_the_enthalpy_change_of_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/how_do_you_reset_a_remote_control.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_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 5824 bytes
SHA-256: d4214cef37787760b9647fbdadf14cc7cdef9fed42e49e6913f1ce7f1f343456
font_01_sfnt_off0001299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299B 11064 bytes
SHA-256: 12e5c8316d9989fe99dd0b6f43cbd8369a448de6d8b00f304d6e19f5a3772d32

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