Malicious PDF — malware analysis report

Static analysis result for SHA-256 790d6e36f3268cc3…

MALICIOUS

PDF

80.3 KB Created: 2021-05-01 12:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7ebcfe3259914e81b831d1bbcfec0b95 SHA-1: a160671baeb3c6c49d765a9f1df1ebfe481fc62b SHA-256: 790d6e36f3268cc32baf9d6a713ff4caa9e6e2adfecb6a1308956114038aa0bb
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used for phishing or malware distribution. The PDF structure and embedded URLs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=moultrie+model+mcg-12589 PDF link annotation
    • https://cdn.sqhk.co/jutusaxibu/4fEIikY/26087462891.pdfIn PDF document text
    • http://milanbeach.fun/83089549043tlcjo.pdfIn PDF document text
    • http://visionnew.xyz/vibuvemuvorinapidekedsyw3.pdfIn PDF document text
    • https://dojibosuxuzepi.weebly.com/uploads/1/3/1/3/131378780/5058091.pdfIn PDF document text
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/xitetinalabu_dixoximelopimes_dofivoget_zidiworev.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/hcgchiq/oxygen_levels_low.pdfIn PDF document text
    • https://wutaleba.weebly.com/uploads/1/3/5/3/135390467/8061207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_6039b0098ce9f.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/project_report_on_food_adulteration.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/types_of_cartilage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417809/normal_5ff63113a52b7.pdfIn PDF document text
    • https://fozipapuratub.weebly.com/uploads/1/3/6/0/136088586/602444c8434b44.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/QUnTgeU/8136716694.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/pdic3ii/68584567670.pdfIn PDF document text
    • http://vibemezanolex.mypressonline.com/fetal_distress_dalam_kehamilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_600e85babf5ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5fc6b3cfb9526.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/remavuj/15382006574.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/properties_of_2d_shapes_worksheet_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/alexa_app_apk_for_iphone.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/trumpet_music_theory.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/dugalep.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/download_playboy_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/authy_pro_apk.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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 5568 bytes
SHA-256: 3f5b366913c08544da858fbeee23109cf06c7d0264f5f0e1f94e9737ceb09a45
font_01_sfnt_off00010d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 11388 bytes
SHA-256: 70cad6810a95a48174dc24b5a350b0d43d23cd9b015ca9147a6dcaec14e176c8

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