Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22605b73916164b…

MALICIOUS

PDF

79.9 KB Created: 2021-02-27 22:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fd7a2bd0a0f02fcb81e884f61c068d84 SHA-1: c528232535ba6b90341c46d67956f47f42be8433 SHA-256: d22605b73916164bc560b2eef38e4445cb250bbf40c1434c8a5866f6e575ef52
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

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
  • 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://xezojetit.ru/123?utm_term=how+to+present+data+in+pie+chart+in+excel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff6c227ab971.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/OWDjgyp/dj_horn_competition_song_download.pdfIn PDF document text
    • https://cdn.sqhk.co/poniroxam/hjAiaW4/koxulatob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409609/normal_600585bcada2c.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/1RwidiO/kaxazemojo.pdfIn PDF document text
    • http://uanews.website/raving_fans_sparknoteshlm7q.pdfIn PDF document text
    • http://openchambre.xyz/4672459178481i5d.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hfg8bAi/153663792.pdfIn PDF document text
    • http://donbetosstreettacos.com/walmart_grocery_delivery_ebt3vnsq.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/jjjjehg/greatest_love_songs_of_all_time_rock.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fc7c2acb965e.pdfIn PDF document text
    • http://batut.space/que_tipos_de_funciones_de_lenguaje_haye30t3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5fc7782d6ec55.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/4hdhitB/becoming_a_werewolf_dream_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/gdCCZeC/virus_scanner_for_mac.pdfIn PDF document text
    • http://groshyk.site/780633402642v4dk.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/gjChehj/saudade_portuguese_to_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fd8f35629fc0.pdfIn PDF document text
    • http://hamlikjorettoop.ru/the_brown_v_board_of_education_case_1954_reverse_the_courts_ruling_in_the_caseqbkwd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 5284 bytes
SHA-256: 353e649758ca5c63d57832d6f08feb05eb1acdd1e5fe97333bb72077258228d6
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 11084 bytes
SHA-256: 5ace644005bfb7d727fd7dab5f121c7a654a6f7bebf44d0a6b9e176a005d748d

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