Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b363b8e08926a9c…

MALICIOUS

PDF

77.4 KB Created: 2021-04-02 01:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ca042e2fca51e7b515ea0f473eaf3a71 SHA-1: 281d2ecb3b87775b956b9f179ab19895d84b318d SHA-256: 9b363b8e08926a9c0e8f6233ea7272a78d9fbb1258ec5f7028c2f02eaf2190dd
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an embedded external URI pointing to a suspicious domain, which is also listed as a URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=hp+probook+6570b+memory+specifications PDF link annotation
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/1bcecca67d1eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_60343781e25cd.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/vanap.pdfIn PDF document text
    • https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/3340928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff6872ec1e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_601e381dec0ae.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/42f80bdc.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/iqgfDiZ/nodogixariwor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421352/normal_5fe1d2ab22f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_604833fa6b4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_600bad981d422.pdfIn PDF document text
    • https://zofijakifixanow.weebly.com/uploads/1/3/4/6/134677560/dijirabemol_pakedexopur.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/bLUiagg/evolutionary_theory_of_sleep_author.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/gjjbmRO/optimized_necromancer_build_5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601438d557467.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/memobofilenabon/antalyaspor_yeni_forma_fiyatlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32fce1ee-53b0-4535-9f02-f84f882bbb84/iso_9001_version_2008_certified_companies_list_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/structures_why_things_dont_fall_down_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8bb9b99-ff66-4196-8d32-5f987d0e5a6a/nuzorobanewiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b62e49-4f5c-4b34-ac82-d354197ce5f2/1st_hundred_fry_words.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/30475748583.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/87848635570.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/spelling_rules_for_plurals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6237b323-d9b3-413a-8109-70c9ceb57095/how_to_connect_afterglow_controller_to_nintendo_switch.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_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 5896 bytes
SHA-256: ef4b61ad1b0efb920e1199ba55fa84a47411da833001ddb329fcbf85c6b82552
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 11764 bytes
SHA-256: 885a66252a4e24ba6af7cbd13053bd80602cb23fd3f34a5bb4a333c4dae91652

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