Malicious PDF — malware analysis report

Static analysis result for SHA-256 300a9d6a2b78329d…

MALICIOUS

PDF

83.2 KB Created: 2021-05-27 20:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b2ed1af96a0662d79cb0e06083fbfc SHA-1: 10131bf5576125b683aa1dbdd3841604d8399410 SHA-256: 300a9d6a2b78329d5ebcf8c975eb427c5eb1237fffd8b6a70e7d9b855834c139
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The embedded URL 'https://resalured.ru/wb?keyword=how%20to%20day%20trade%20on%20robinhood%20for%20beginners' suggests a phishing or scam attempt related to financial trading. While no scripts were explicitly extracted, the PDF structure and heuristics strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wb?keyword=how%20to%20day%20trade%20on%20robinhood%20for%20beginners
    • https://rukawaxosudeda.weebly.com/uploads/1/3/4/3/134308265/gekapik.pdf
    • https://pivuwolugere.weebly.com/uploads/1/3/4/0/134041199/4429085.pdf
    • https://wupuvogobed.weebly.com/uploads/1/3/4/5/134507139/6c96215ec04f.pdf
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/7ead0.pdf
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/nunapipulolal-bapakenajuxixim.pdf
    • https://cdn-cms.f-static.net/uploads/4422180/normal_60438ce12e3e2.pdf
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fdc70918f0b4.pdf
    • https://boxuxalido.weebly.com/uploads/1/3/0/8/130814411/592294.pdf
    • https://wiliwakura.weebly.com/uploads/1/3/4/5/134596421/5f5234167ec.pdf
    • https://mijekonepe.weebly.com/uploads/1/3/2/8/132815105/gasaforugowufe-xemorevaxezoj-labakive-gumajowu.pdf
    • https://jezelide.weebly.com/uploads/1/3/0/8/130874318/326e90f60.pdf
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/539598.pdf
    • https://cdn-cms.f-static.net/uploads/4477638/normal_5fd2a2f6815ce.pdf
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/be4c55518594753.pdf
    • https://lefexaro.weebly.com/uploads/1/3/5/3/135324439/jikobakebu.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_600c3ecf49fc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3e6a066c-aa40-422c-b0c7-f0019c49119e/2004_g35_manual_transmission_fluid.pdf
    • https://uploads.strikinglycdn.com/files/26029508-0750-4bed-90c4-7f4b67bff5fe/nokunuloxixutupegabat.pdf
    • https://uploads.strikinglycdn.com/files/0f888261-f0bb-4ebe-af05-0f4e073adbce/93737196917.pdf
    • https://uploads.strikinglycdn.com/files/bf0e3ad6-9366-435b-8b06-e43ac2cc19ed/how_to_wrap_big_box_gifts.pdf
    • https://uploads.strikinglycdn.com/files/849228e1-0ac1-49c5-b628-8c2f8579ba9e/vilixekolivisinefilexe.pdf
    • https://uploads.strikinglycdn.com/files/7d7f324e-20ea-4c66-8325-96625877fb5b/frozen_jr_broadway_script.pdf
    • https://uploads.strikinglycdn.com/files/ae7ecd9a-a362-4f4f-b4c8-90af318984ad/lemateregodemejejat.pdf
    • https://uploads.strikinglycdn.com/files/cb47e74e-32c1-46ff-8be2-c7756a255eb2/webasixovimetatigapuladu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f776.bin
db9ef79dd10b146de4ea4878540322cc42a5bc53ad9f45a35d02b45c21a59523		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 5220 bytes
font_01_sfnt_off00010942.bin
812833955a6795de4f64b87cd8e58b8a2ec0dd2665d09404eca72aa7389b0a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 11108 bytes
font_02_sfnt_off00012f47.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 4324 bytes

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