Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d786c986d572714…

MALICIOUS

PDF

83.6 KB Created: 2021-05-28 04:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08567fccc02e7f7dee33f6972388587 SHA-1: 2b6105319faf565346a3da7c942a83a9c8882fa3 SHA-256: 3d786c986d5727142eab759e6d08ce6a8524eee49fc4e1ebe21868588244931d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, and one specific URL related to 'blackberry priv custom firmware'. The ClamAV detection and ML classifier strongly indicate maliciousness, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and external link farm suggest an attempt to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=blackberry+priv+custom+firmware
    • https://cdn-cms.f-static.net/uploads/4402711/normal_6035b3c46915a.pdf
    • https://xilivixawigilu.weebly.com/uploads/1/3/4/6/134672458/disapixava.pdf
    • https://bifutizuwosedi.weebly.com/uploads/1/3/4/6/134645412/tudufim.pdf
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fc8ac663d3e7.pdf
    • https://malugeko.weebly.com/uploads/1/3/1/6/131636988/9769318.pdf
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/winokagexolu.pdf
    • https://pepajodik.weebly.com/uploads/1/3/1/4/131453945/3966d.pdf
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/foxegokivijugu.pdf
    • https://zenijubam.weebly.com/uploads/1/3/4/8/134884092/gofivozepi_gidekemez_lubiwi_dajob.pdf
    • https://penomagara.weebly.com/uploads/1/3/2/6/132695387/lekewimurovu.pdf
    • https://static.s123-cdn-static.com/uploads/4417537/normal_5fefc13189c6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5fc3064e-7e02-4ec7-9586-309a8fabde76/mary_warner_marien_photography_a_cultural_history_4th_edition_pearson.pdf
    • https://uploads.strikinglycdn.com/files/966c8b86-9229-454c-9188-25185d99b104/9342585705.pdf
    • https://uploads.strikinglycdn.com/files/0ebeca0c-0943-4305-b4d3-f49f1fe9a1c6/72821725429.pdf
    • https://uploads.strikinglycdn.com/files/e3575f76-401b-4c62-99a6-7f419eb67e98/el_vendedor_ms_grande_del_mundo_parte_2_resumen_por_captulos.pdf
    • https://uploads.strikinglycdn.com/files/f1fbd2e7-944c-4d84-a785-f5925c240110/nezidafuk.pdf
    • https://uploads.strikinglycdn.com/files/2ea7a2ca-1130-4ad7-a8a8-98a6986e6acf/orion_cooker_recipes_ham.pdf
    • https://uploads.strikinglycdn.com/files/721c96ca-06d8-4d59-be0f-04d161657515/86122429311.pdf
    • https://uploads.strikinglycdn.com/files/bfa2e814-6a4b-4117-aba5-23a0bcc3ac46/28838864438.pdf
    • https://uploads.strikinglycdn.com/files/e2d06a97-3f1b-40d6-bb34-8f9cbd84442e/how_to_do_order_of_operations_with_square_roots.pdf
    • https://uploads.strikinglycdn.com/files/ea58d9cc-fbef-476e-99ff-099e0add891b/pejexowaxekux.pdf
    • https://uploads.strikinglycdn.com/files/38875d3e-7e01-47b5-9a3c-4dff86302456/54551686206.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_off0000f9f7.bin
58cc7310235d398eecce49ae8496594cdaf0ada2fa3d617685feaf20d0cfa33e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 5668 bytes
font_01_sfnt_off00010d4b.bin
f88c57c62da372e31ee43ca9063f773497192a37fafebb23eab49b18b78102dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 20620 bytes

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